diff --git a/CHANGELOG.md b/CHANGELOG.md
index 46a704739..d4eb48283 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,8 +4,54 @@ All notable changes to this project will be documented in this file. Dates are d
 
 Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
+#### [1.13.1](https://github.com/gradido/gradido/compare/1.13.0...1.13.1)
+
+- Fix: correctly evaluate to EMAIL_TEST_MODE to false [`#2273`](https://github.com/gradido/gradido/pull/2273)
+- Refactor: Contribution resolver logs and events [`#2231`](https://github.com/gradido/gradido/pull/2231)
+
+#### [1.13.0](https://github.com/gradido/gradido/compare/1.12.1...1.13.0)
+
+> 18 October 2022
+
+- release: Version 1.13.0 [`#2269`](https://github.com/gradido/gradido/pull/2269)
+- fix: Linked User Email in Transaction List [`#2268`](https://github.com/gradido/gradido/pull/2268)
+- concept capturing alias [`#2148`](https://github.com/gradido/gradido/pull/2148)
+- fix: 🍰 Daily Redeem Of Contribution Link [`#2265`](https://github.com/gradido/gradido/pull/2265)
+- fix: 🐛 Prevent Loosing Redeem Code When Changing Between Register and Login in Auth Navbar [`#2260`](https://github.com/gradido/gradido/pull/2260)
+- fix: Disable Change of Month on Update Contribution [`#2264`](https://github.com/gradido/gradido/pull/2264)
+- feat: 🍰 Global Jest Extension For Decimal Equal [`#2261`](https://github.com/gradido/gradido/pull/2261)
+- feat: 🍰 Daily Rule For Contribution Links In Admin Interface [`#2262`](https://github.com/gradido/gradido/pull/2262)
+- feat: 🍰 Do Not Show Expired Contribution Links In Wallet [`#2257`](https://github.com/gradido/gradido/pull/2257)
+- fix: 🍰 Disable Change Of Month For Update Contribution (wallet and admin) [`#2258`](https://github.com/gradido/gradido/pull/2258)
+- refactor: 🍰 Login And Logout To Mutations [`#2232`](https://github.com/gradido/gradido/pull/2232)
+- fix: 🐛 Verify Token Before Redeeming A Link [`#2254`](https://github.com/gradido/gradido/pull/2254)
+- Refactor: Add all events to documentation table [`#2240`](https://github.com/gradido/gradido/pull/2240)
+- reconfig log4js with rollover feature and userid in logevent-message [`#2221`](https://github.com/gradido/gradido/pull/2221)
+- refactor: 🍰 Refactoring Components Of `CotributionMessagesListItem` [`#2251`](https://github.com/gradido/gradido/pull/2251)
+- style: add border-radius on send form [`#2233`](https://github.com/gradido/gradido/pull/2233)
+- 2198 adminarea more dates on created transaction [`#2212`](https://github.com/gradido/gradido/pull/2212)
+- Bug: delete contribution link [`#2213`](https://github.com/gradido/gradido/pull/2213)
+- chore: 🍰 Fix Cypress Tests Unreliability [`#2245`](https://github.com/gradido/gradido/pull/2245)
+- docs: 🍰 Refine Deployment Documentation [`#2209`](https://github.com/gradido/gradido/pull/2209)
+- End-to-end test setup [`#2047`](https://github.com/gradido/gradido/pull/2047)
+- config testmodus flag for sending emails to test or team account instead of user account [`#2216`](https://github.com/gradido/gradido/pull/2216)
+- GradidoID 1: adapt and migrate database schema [`#2058`](https://github.com/gradido/gradido/pull/2058)
+- feat: Add Client Request Time to Context [`#2206`](https://github.com/gradido/gradido/pull/2206)
+- 2219 feature rework eventprotocol [`#2234`](https://github.com/gradido/gradido/pull/2234)
+- Refactor: Test register with redeem code [`#2214`](https://github.com/gradido/gradido/pull/2214)
+- 2203 delete query modal when redeeming the redeem link [`#2211`](https://github.com/gradido/gradido/pull/2211)
+- Refactor: 🍰 Change email templates [`#2228`](https://github.com/gradido/gradido/pull/2228)
+- Refactor: Events and logs completed in User Resolver [`#2204`](https://github.com/gradido/gradido/pull/2204)
+- change support mail [`#2210`](https://github.com/gradido/gradido/pull/2210)
+- feat: 🍰 Send email when contribution is confirmed [`#2193`](https://github.com/gradido/gradido/pull/2193)
+- feat: 🍰 Send email when admin writes message to contribution [`#2187`](https://github.com/gradido/gradido/pull/2187)
+- feat: 🍰 Send Email To Transaction Link Sender After Receiver Redeemed It [`#2063`](https://github.com/gradido/gradido/pull/2063)
+
 #### [1.12.1](https://github.com/gradido/gradido/compare/1.12.0...1.12.1)
 
+> 13 September 2022
+
+- release: Version 1.12.1 [`#2196`](https://github.com/gradido/gradido/pull/2196)
 - fix: 🍰 Show Not Icons In `allContribution` List [`#2195`](https://github.com/gradido/gradido/pull/2195)
 
 #### [1.12.0](https://github.com/gradido/gradido/compare/1.11.0...1.12.0)
diff --git a/admin/package.json b/admin/package.json
index f56ae0a87..2db889771 100644
--- a/admin/package.json
+++ b/admin/package.json
@@ -3,7 +3,7 @@
   "description": "Administraion Interface for Gradido",
   "main": "index.js",
   "author": "Moriz Wahl",
-  "version": "1.12.1",
+  "version": "1.13.1",
   "license": "Apache-2.0",
   "private": false,
   "scripts": {
diff --git a/admin/src/components/ContributionMessages/LinkifyMessage.vue b/admin/src/components/ContributionMessages/LinkifyMessage.vue
new file mode 100644
index 000000000..3e66b8bf3
--- /dev/null
+++ b/admin/src/components/ContributionMessages/LinkifyMessage.vue
@@ -0,0 +1,38 @@
+<template>
+  <div class="mt-2">
+    <span v-for="({ type, text }, index) in linkifiedMessage" :key="index">
+      <b-link v-if="type === 'link'" :to="text">{{ text }}</b-link>
+      <span v-else>{{ text }}</span>
+    </span>
+  </div>
+</template>
+
+<script>
+const LINK_REGEX_PATTERN =
+  /(https?:\/\/(www\.)?[-a-zA-Z0-9@:%._+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_+.~#?&//=]*))/i
+
+export default {
+  name: 'LinkifyMessage',
+  props: {
+    message: {
+      type: String,
+      required: true,
+    },
+  },
+  computed: {
+    linkifiedMessage() {
+      const linkified = []
+      let string = this.message
+      let match
+      while ((match = string.match(LINK_REGEX_PATTERN))) {
+        if (match.index > 0)
+          linkified.push({ type: 'text', text: string.substring(0, match.index) })
+        linkified.push({ type: 'link', text: match[0] })
+        string = string.substring(match.index + match[0].length)
+      }
+      if (string.length > 0) linkified.push({ type: 'text', text: string })
+      return linkified
+    },
+  },
+}
+</script>
diff --git a/admin/src/components/ContributionMessages/slots/ContributionMessagesListItem.spec.js b/admin/src/components/ContributionMessages/slots/ContributionMessagesListItem.spec.js
index b8aaba502..c1a4e65c6 100644
--- a/admin/src/components/ContributionMessages/slots/ContributionMessagesListItem.spec.js
+++ b/admin/src/components/ContributionMessages/slots/ContributionMessagesListItem.spec.js
@@ -125,4 +125,68 @@ describe('ContributionMessagesListItem', () => {
       })
     })
   })
+
+  describe('links in contribtion message', () => {
+    const propsData = {
+      message: {
+        id: 111,
+        message: 'Lorem ipsum?',
+        createdAt: '2022-08-29T12:23:27.000Z',
+        updatedAt: null,
+        type: 'DIALOG',
+        userFirstName: 'Peter',
+        userLastName: 'Lustig',
+        userId: 107,
+        __typename: 'ContributionMessage',
+      },
+    }
+
+    const ModeratorItemWrapper = () => {
+      return mount(ContributionMessagesListItem, {
+        localVue,
+        mocks,
+        propsData,
+      })
+    }
+
+    let messageField
+
+    describe('message of only one link', () => {
+      beforeEach(() => {
+        propsData.message.message = 'https://gradido.net/de/'
+        wrapper = ModeratorItemWrapper()
+        messageField = wrapper.find('div.is-not-moderator.text-left > div:nth-child(4)')
+      })
+
+      it('contains the link as text', () => {
+        expect(messageField.text()).toBe('https://gradido.net/de/')
+      })
+
+      it('contains a link to the given address', () => {
+        expect(messageField.find('a').attributes('href')).toBe('https://gradido.net/de/')
+      })
+    })
+
+    describe('message with text and two links', () => {
+      beforeEach(() => {
+        propsData.message.message = `Here you find all you need to know about Gradido: https://gradido.net/de/
+and here is the link to the repository: https://github.com/gradido/gradido`
+        wrapper = ModeratorItemWrapper()
+        messageField = wrapper.find('div.is-not-moderator.text-left > div:nth-child(4)')
+      })
+
+      it('contains the whole text', () => {
+        expect(messageField.text())
+          .toBe(`Here you find all you need to know about Gradido: https://gradido.net/de/
+and here is the link to the repository: https://github.com/gradido/gradido`)
+      })
+
+      it('contains the two links', () => {
+        expect(messageField.findAll('a').at(0).attributes('href')).toBe('https://gradido.net/de/')
+        expect(messageField.findAll('a').at(1).attributes('href')).toBe(
+          'https://github.com/gradido/gradido',
+        )
+      })
+    })
+  })
 })
diff --git a/admin/src/components/ContributionMessages/slots/ContributionMessagesListItem.vue b/admin/src/components/ContributionMessages/slots/ContributionMessagesListItem.vue
index 796ff5f30..30960bd33 100644
--- a/admin/src/components/ContributionMessages/slots/ContributionMessagesListItem.vue
+++ b/admin/src/components/ContributionMessages/slots/ContributionMessagesListItem.vue
@@ -1,23 +1,28 @@
 <template>
   <div class="contribution-messages-list-item">
     <div v-if="message.isModerator" class="text-right is-moderator">
-      <b-avatar square :text="initialLetters" variant="warning"></b-avatar>
+      <b-avatar square variant="warning"></b-avatar>
       <span class="ml-2 mr-2">{{ message.userFirstName }} {{ message.userLastName }}</span>
       <span class="ml-2">{{ $d(new Date(message.createdAt), 'short') }}</span>
       <small class="ml-4 text-success">{{ $t('moderator') }}</small>
-      <div class="mt-2">{{ message.message }}</div>
+      <linkify-message :message="message.message"></linkify-message>
     </div>
     <div v-else class="text-left is-not-moderator">
-      <b-avatar :text="initialLetters" variant="info"></b-avatar>
+      <b-avatar variant="info"></b-avatar>
       <span class="ml-2 mr-2">{{ message.userFirstName }} {{ message.userLastName }}</span>
       <span class="ml-2">{{ $d(new Date(message.createdAt), 'short') }}</span>
-      <div class="mt-2">{{ message.message }}</div>
+      <linkify-message :message="message.message"></linkify-message>
     </div>
   </div>
 </template>
 <script>
+import LinkifyMessage from '@/components/ContributionMessages/LinkifyMessage.vue'
+
 export default {
   name: 'ContributionMessagesListItem',
+  components: {
+    LinkifyMessage,
+  },
   props: {
     message: {
       type: Object,
diff --git a/backend/package.json b/backend/package.json
index 2a054314f..6cd886735 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "gradido-backend",
-  "version": "1.12.1",
+  "version": "1.13.1",
   "description": "Gradido unified backend providing an API-Service for Gradido Transactions",
   "main": "src/index.ts",
   "repository": "https://github.com/gradido/gradido/backend",
diff --git a/backend/src/config/index.ts b/backend/src/config/index.ts
index 3e6bafd9f..f31dfc93d 100644
--- a/backend/src/config/index.ts
+++ b/backend/src/config/index.ts
@@ -10,7 +10,7 @@ Decimal.set({
 })
 
 const constants = {
-  DB_VERSION: '0049-add_user_contacts_table',
+  DB_VERSION: '0051-add_delete_by_to_contributions',
   DECAY_START_TIME: new Date('2021-05-13 17:46:31-0000'), // GMT+0
   LOG4JS_CONFIG: 'log4js-config.json',
   // default log level on production should be info
@@ -67,7 +67,7 @@ const loginServer = {
 
 const email = {
   EMAIL: process.env.EMAIL === 'true' || false,
-  EMAIL_TEST_MODUS: process.env.EMAIL_TEST_MODUS === 'true' || 'false',
+  EMAIL_TEST_MODUS: process.env.EMAIL_TEST_MODUS === 'true' || false,
   EMAIL_TEST_RECEIVER: process.env.EMAIL_TEST_RECEIVER || 'stage1@gradido.net',
   EMAIL_USERNAME: process.env.EMAIL_USERNAME || 'gradido_email',
   EMAIL_SENDER: process.env.EMAIL_SENDER || 'info@gradido.net',
diff --git a/backend/src/event/Event.ts b/backend/src/event/Event.ts
index 85fba896d..d86ddf15f 100644
--- a/backend/src/event/Event.ts
+++ b/backend/src/event/Event.ts
@@ -11,48 +11,67 @@ export class EventBasicUserId extends EventBasic {
 }
 
 export class EventBasicTx extends EventBasicUserId {
-  xUserId: number
-  xCommunityId: number
   transactionId: number
   amount: decimal
 }
 
+export class EventBasicTxX extends EventBasicTx {
+  xUserId: number
+  xCommunityId: number
+}
+
 export class EventBasicCt extends EventBasicUserId {
   contributionId: number
   amount: decimal
 }
 
+export class EventBasicCtX extends EventBasicCt {
+  xUserId: number
+  xCommunityId: number
+}
+
 export class EventBasicRedeem extends EventBasicUserId {
   transactionId?: number
   contributionId?: number
 }
 
+export class EventBasicCtMsg extends EventBasicCt {
+  messageId: number
+}
+
 export class EventVisitGradido extends EventBasic {}
 export class EventRegister extends EventBasicUserId {}
 export class EventRedeemRegister extends EventBasicRedeem {}
+export class EventVerifyRedeem extends EventBasicRedeem {}
 export class EventInactiveAccount extends EventBasicUserId {}
 export class EventSendConfirmationEmail extends EventBasicUserId {}
 export class EventSendAccountMultiRegistrationEmail extends EventBasicUserId {}
+export class EventSendForgotPasswordEmail extends EventBasicUserId {}
+export class EventSendTransactionSendEmail extends EventBasicTxX {}
+export class EventSendTransactionReceiveEmail extends EventBasicTxX {}
+export class EventSendTransactionLinkRedeemEmail extends EventBasicTxX {}
+export class EventSendAddedContributionEmail extends EventBasicCt {}
+export class EventSendContributionConfirmEmail extends EventBasicCt {}
 export class EventConfirmationEmail extends EventBasicUserId {}
 export class EventRegisterEmailKlicktipp extends EventBasicUserId {}
 export class EventLogin extends EventBasicUserId {}
+export class EventLogout extends EventBasicUserId {}
 export class EventRedeemLogin extends EventBasicRedeem {}
 export class EventActivateAccount extends EventBasicUserId {}
 export class EventPasswordChange extends EventBasicUserId {}
-export class EventTransactionSend extends EventBasicTx {}
-export class EventTransactionSendRedeem extends EventBasicTx {}
-export class EventTransactionRepeateRedeem extends EventBasicTx {}
-export class EventTransactionCreation extends EventBasicUserId {
-  transactionId: number
-  amount: decimal
-}
-export class EventTransactionReceive extends EventBasicTx {}
-export class EventTransactionReceiveRedeem extends EventBasicTx {}
+export class EventTransactionSend extends EventBasicTxX {}
+export class EventTransactionSendRedeem extends EventBasicTxX {}
+export class EventTransactionRepeateRedeem extends EventBasicTxX {}
+export class EventTransactionCreation extends EventBasicTx {}
+export class EventTransactionReceive extends EventBasicTxX {}
+export class EventTransactionReceiveRedeem extends EventBasicTxX {}
 export class EventContributionCreate extends EventBasicCt {}
-export class EventContributionConfirm extends EventBasicCt {
-  xUserId: number
-  xCommunityId: number
-}
+export class EventUserCreateContributionMessage extends EventBasicCtMsg {}
+export class EventAdminCreateContributionMessage extends EventBasicCtMsg {}
+export class EventContributionDelete extends EventBasicCt {}
+export class EventContributionUpdate extends EventBasicCt {}
+export class EventContributionConfirm extends EventBasicCtX {}
+export class EventContributionDeny extends EventBasicCtX {}
 export class EventContributionLinkDefine extends EventBasicCt {}
 export class EventContributionLinkActivateRedeem extends EventBasicCt {}
 
@@ -100,6 +119,13 @@ export class Event {
     return this
   }
 
+  public setEventVerifyRedeem(ev: EventVerifyRedeem): Event {
+    this.setByBasicRedeem(ev.userId, ev.transactionId, ev.contributionId)
+    this.type = EventProtocolType.VERIFY_REDEEM
+
+    return this
+  }
+
   public setEventInactiveAccount(ev: EventInactiveAccount): Event {
     this.setByBasicUser(ev.userId)
     this.type = EventProtocolType.INACTIVE_ACCOUNT
@@ -118,7 +144,49 @@ export class Event {
     ev: EventSendAccountMultiRegistrationEmail,
   ): Event {
     this.setByBasicUser(ev.userId)
-    this.type = EventProtocolType.SEND_ACCOUNT_MULTI_REGISTRATION_EMAIL
+    this.type = EventProtocolType.SEND_ACCOUNT_MULTIREGISTRATION_EMAIL
+
+    return this
+  }
+
+  public setEventSendForgotPasswordEmail(ev: EventSendForgotPasswordEmail): Event {
+    this.setByBasicUser(ev.userId)
+    this.type = EventProtocolType.SEND_FORGOT_PASSWORD_EMAIL
+
+    return this
+  }
+
+  public setEventSendTransactionSendEmail(ev: EventSendTransactionSendEmail): Event {
+    this.setByBasicTxX(ev.userId, ev.transactionId, ev.amount, ev.xUserId, ev.xCommunityId)
+    this.type = EventProtocolType.SEND_TRANSACTION_SEND_EMAIL
+
+    return this
+  }
+
+  public setEventSendTransactionReceiveEmail(ev: EventSendTransactionReceiveEmail): Event {
+    this.setByBasicTxX(ev.userId, ev.transactionId, ev.amount, ev.xUserId, ev.xCommunityId)
+    this.type = EventProtocolType.SEND_TRANSACTION_RECEIVE_EMAIL
+
+    return this
+  }
+
+  public setEventSendTransactionLinkRedeemEmail(ev: EventSendTransactionLinkRedeemEmail): Event {
+    this.setByBasicTxX(ev.userId, ev.transactionId, ev.amount, ev.xUserId, ev.xCommunityId)
+    this.type = EventProtocolType.SEND_TRANSACTION_LINK_REDEEM_EMAIL
+
+    return this
+  }
+
+  public setEventSendAddedContributionEmail(ev: EventSendAddedContributionEmail): Event {
+    this.setByBasicCt(ev.userId, ev.contributionId, ev.amount)
+    this.type = EventProtocolType.SEND_ADDED_CONTRIBUTION_EMAIL
+
+    return this
+  }
+
+  public setEventSendContributionConfirmEmail(ev: EventSendContributionConfirmEmail): Event {
+    this.setByBasicCt(ev.userId, ev.contributionId, ev.amount)
+    this.type = EventProtocolType.SEND_CONTRIBUTION_CONFIRM_EMAIL
 
     return this
   }
@@ -144,6 +212,13 @@ export class Event {
     return this
   }
 
+  public setEventLogout(ev: EventLogout): Event {
+    this.setByBasicUser(ev.userId)
+    this.type = EventProtocolType.LOGOUT
+
+    return this
+  }
+
   public setEventRedeemLogin(ev: EventRedeemLogin): Event {
     this.setByBasicRedeem(ev.userId, ev.transactionId, ev.contributionId)
     this.type = EventProtocolType.REDEEM_LOGIN
@@ -166,44 +241,42 @@ export class Event {
   }
 
   public setEventTransactionSend(ev: EventTransactionSend): Event {
-    this.setByBasicTx(ev.userId, ev.xUserId, ev.xCommunityId, ev.transactionId, ev.amount)
+    this.setByBasicTxX(ev.userId, ev.transactionId, ev.amount, ev.xUserId, ev.xCommunityId)
     this.type = EventProtocolType.TRANSACTION_SEND
 
     return this
   }
 
   public setEventTransactionSendRedeem(ev: EventTransactionSendRedeem): Event {
-    this.setByBasicTx(ev.userId, ev.xUserId, ev.xCommunityId, ev.transactionId, ev.amount)
+    this.setByBasicTxX(ev.userId, ev.transactionId, ev.amount, ev.xUserId, ev.xCommunityId)
     this.type = EventProtocolType.TRANSACTION_SEND_REDEEM
 
     return this
   }
 
   public setEventTransactionRepeateRedeem(ev: EventTransactionRepeateRedeem): Event {
-    this.setByBasicTx(ev.userId, ev.xUserId, ev.xCommunityId, ev.transactionId, ev.amount)
+    this.setByBasicTxX(ev.userId, ev.transactionId, ev.amount, ev.xUserId, ev.xCommunityId)
     this.type = EventProtocolType.TRANSACTION_REPEATE_REDEEM
 
     return this
   }
 
   public setEventTransactionCreation(ev: EventTransactionCreation): Event {
-    this.setByBasicUser(ev.userId)
-    if (ev.transactionId) this.transactionId = ev.transactionId
-    if (ev.amount) this.amount = ev.amount
+    this.setByBasicTx(ev.userId, ev.transactionId, ev.amount)
     this.type = EventProtocolType.TRANSACTION_CREATION
 
     return this
   }
 
   public setEventTransactionReceive(ev: EventTransactionReceive): Event {
-    this.setByBasicTx(ev.userId, ev.xUserId, ev.xCommunityId, ev.transactionId, ev.amount)
+    this.setByBasicTxX(ev.userId, ev.transactionId, ev.amount, ev.xUserId, ev.xCommunityId)
     this.type = EventProtocolType.TRANSACTION_RECEIVE
 
     return this
   }
 
   public setEventTransactionReceiveRedeem(ev: EventTransactionReceiveRedeem): Event {
-    this.setByBasicTx(ev.userId, ev.xUserId, ev.xCommunityId, ev.transactionId, ev.amount)
+    this.setByBasicTxX(ev.userId, ev.transactionId, ev.amount, ev.xUserId, ev.xCommunityId)
     this.type = EventProtocolType.TRANSACTION_RECEIVE_REDEEM
 
     return this
@@ -216,15 +289,48 @@ export class Event {
     return this
   }
 
-  public setEventContributionConfirm(ev: EventContributionConfirm): Event {
+  public setEventUserCreateContributionMessage(ev: EventUserCreateContributionMessage): Event {
+    this.setByBasicCtMsg(ev.userId, ev.contributionId, ev.amount, ev.messageId)
+    this.type = EventProtocolType.USER_CREATE_CONTRIBUTION_MESSAGE
+
+    return this
+  }
+
+  public setEventAdminCreateContributionMessage(ev: EventAdminCreateContributionMessage): Event {
+    this.setByBasicCtMsg(ev.userId, ev.contributionId, ev.amount, ev.messageId)
+    this.type = EventProtocolType.ADMIN_CREATE_CONTRIBUTION_MESSAGE
+
+    return this
+  }
+
+  public setEventContributionDelete(ev: EventContributionDelete): Event {
     this.setByBasicCt(ev.userId, ev.contributionId, ev.amount)
-    if (ev.xUserId) this.xUserId = ev.xUserId
-    if (ev.xCommunityId) this.xCommunityId = ev.xCommunityId
+    this.type = EventProtocolType.CONTRIBUTION_DELETE
+
+    return this
+  }
+
+  public setEventContributionUpdate(ev: EventContributionUpdate): Event {
+    this.setByBasicCt(ev.userId, ev.contributionId, ev.amount)
+    this.type = EventProtocolType.CONTRIBUTION_UPDATE
+
+    return this
+  }
+
+  public setEventContributionConfirm(ev: EventContributionConfirm): Event {
+    this.setByBasicCtX(ev.userId, ev.contributionId, ev.amount, ev.xUserId, ev.xCommunityId)
     this.type = EventProtocolType.CONTRIBUTION_CONFIRM
 
     return this
   }
 
+  public setEventContributionDeny(ev: EventContributionDeny): Event {
+    this.setByBasicCtX(ev.userId, ev.contributionId, ev.amount, ev.xUserId, ev.xCommunityId)
+    this.type = EventProtocolType.CONTRIBUTION_DENY
+
+    return this
+  }
+
   public setEventContributionLinkDefine(ev: EventContributionLinkDefine): Event {
     this.setByBasicCt(ev.userId, ev.contributionId, ev.amount)
     this.type = EventProtocolType.CONTRIBUTION_LINK_DEFINE
@@ -246,26 +352,58 @@ export class Event {
     return this
   }
 
-  setByBasicTx(
-    userId: number,
-    xUserId?: number,
-    xCommunityId?: number,
-    transactionId?: number,
-    amount?: decimal,
-  ): Event {
+  setByBasicTx(userId: number, transactionId: number, amount: decimal): Event {
     this.setByBasicUser(userId)
-    if (xUserId) this.xUserId = xUserId
-    if (xCommunityId) this.xCommunityId = xCommunityId
-    if (transactionId) this.transactionId = transactionId
-    if (amount) this.amount = amount
+    this.transactionId = transactionId
+    this.amount = amount
 
     return this
   }
 
-  setByBasicCt(userId: number, contributionId: number, amount?: decimal): Event {
+  setByBasicTxX(
+    userId: number,
+    transactionId: number,
+    amount: decimal,
+    xUserId: number,
+    xCommunityId: number,
+  ): Event {
+    this.setByBasicTx(userId, transactionId, amount)
+    this.xUserId = xUserId
+    this.xCommunityId = xCommunityId
+
+    return this
+  }
+
+  setByBasicCt(userId: number, contributionId: number, amount: decimal): Event {
     this.setByBasicUser(userId)
-    if (contributionId) this.contributionId = contributionId
-    if (amount) this.amount = amount
+    this.contributionId = contributionId
+    this.amount = amount
+
+    return this
+  }
+
+  setByBasicCtMsg(
+    userId: number,
+    contributionId: number,
+    amount: decimal,
+    messageId: number,
+  ): Event {
+    this.setByBasicCt(userId, contributionId, amount)
+    this.messageId = messageId
+
+    return this
+  }
+
+  setByBasicCtX(
+    userId: number,
+    contributionId: number,
+    amount: decimal,
+    xUserId: number,
+    xCommunityId: number,
+  ): Event {
+    this.setByBasicCt(userId, contributionId, amount)
+    this.xUserId = xUserId
+    this.xCommunityId = xCommunityId
 
     return this
   }
@@ -278,27 +416,6 @@ export class Event {
     return this
   }
 
-  setByEventTransactionCreation(event: EventTransactionCreation): Event {
-    this.type = event.type
-    this.createdAt = event.createdAt
-    this.userId = event.userId
-    this.transactionId = event.transactionId
-    this.amount = event.amount
-
-    return this
-  }
-
-  setByEventContributionConfirm(event: EventContributionConfirm): Event {
-    this.type = event.type
-    this.createdAt = event.createdAt
-    this.userId = event.userId
-    this.xUserId = event.xUserId
-    this.xCommunityId = event.xCommunityId
-    this.amount = event.amount
-
-    return this
-  }
-
   id: number
   type: string
   createdAt: Date
@@ -308,4 +425,5 @@ export class Event {
   transactionId?: number
   contributionId?: number
   amount?: decimal
+  messageId?: number
 }
diff --git a/backend/src/event/EventProtocolType.ts b/backend/src/event/EventProtocolType.ts
index 52bcf8349..d53eb6961 100644
--- a/backend/src/event/EventProtocolType.ts
+++ b/backend/src/event/EventProtocolType.ts
@@ -3,23 +3,36 @@ export enum EventProtocolType {
   VISIT_GRADIDO = 'VISIT_GRADIDO',
   REGISTER = 'REGISTER',
   REDEEM_REGISTER = 'REDEEM_REGISTER',
+  VERIFY_REDEEM = 'VERIFY_REDEEM',
   INACTIVE_ACCOUNT = 'INACTIVE_ACCOUNT',
   SEND_CONFIRMATION_EMAIL = 'SEND_CONFIRMATION_EMAIL',
-  SEND_ACCOUNT_MULTI_REGISTRATION_EMAIL = 'SEND_ACCOUNT_MULTI_REGISTRATION_EMAIL',
+  SEND_ACCOUNT_MULTIREGISTRATION_EMAIL = 'SEND_ACCOUNT_MULTIREGISTRATION_EMAIL',
   CONFIRM_EMAIL = 'CONFIRM_EMAIL',
   REGISTER_EMAIL_KLICKTIPP = 'REGISTER_EMAIL_KLICKTIPP',
   LOGIN = 'LOGIN',
+  LOGOUT = 'LOGOUT',
   REDEEM_LOGIN = 'REDEEM_LOGIN',
   ACTIVATE_ACCOUNT = 'ACTIVATE_ACCOUNT',
+  SEND_FORGOT_PASSWORD_EMAIL = 'SEND_FORGOT_PASSWORD_EMAIL',
   PASSWORD_CHANGE = 'PASSWORD_CHANGE',
+  SEND_TRANSACTION_SEND_EMAIL = 'SEND_TRANSACTION_SEND_EMAIL',
+  SEND_TRANSACTION_RECEIVE_EMAIL = 'SEND_TRANSACTION_RECEIVE_EMAIL',
   TRANSACTION_SEND = 'TRANSACTION_SEND',
   TRANSACTION_SEND_REDEEM = 'TRANSACTION_SEND_REDEEM',
   TRANSACTION_REPEATE_REDEEM = 'TRANSACTION_REPEATE_REDEEM',
   TRANSACTION_CREATION = 'TRANSACTION_CREATION',
   TRANSACTION_RECEIVE = 'TRANSACTION_RECEIVE',
   TRANSACTION_RECEIVE_REDEEM = 'TRANSACTION_RECEIVE_REDEEM',
+  SEND_TRANSACTION_LINK_REDEEM_EMAIL = 'SEND_TRANSACTION_LINK_REDEEM_EMAIL',
+  SEND_ADDED_CONTRIBUTION_EMAIL = 'SEND_ADDED_CONTRIBUTION_EMAIL',
+  SEND_CONTRIBUTION_CONFIRM_EMAIL = 'SEND_CONTRIBUTION_CONFIRM_EMAIL',
   CONTRIBUTION_CREATE = 'CONTRIBUTION_CREATE',
   CONTRIBUTION_CONFIRM = 'CONTRIBUTION_CONFIRM',
+  CONTRIBUTION_DENY = 'CONTRIBUTION_DENY',
   CONTRIBUTION_LINK_DEFINE = 'CONTRIBUTION_LINK_DEFINE',
   CONTRIBUTION_LINK_ACTIVATE_REDEEM = 'CONTRIBUTION_LINK_ACTIVATE_REDEEM',
+  CONTRIBUTION_DELETE = 'CONTRIBUTION_DELETE',
+  CONTRIBUTION_UPDATE = 'CONTRIBUTION_UPDATE',
+  USER_CREATE_CONTRIBUTION_MESSAGE = 'USER_CREATE_CONTRIBUTION_MESSAGE',
+  ADMIN_CREATE_CONTRIBUTION_MESSAGE = 'ADMIN_CREATE_CONTRIBUTION_MESSAGE',
 }
diff --git a/backend/src/graphql/resolver/AdminResolver.test.ts b/backend/src/graphql/resolver/AdminResolver.test.ts
index 8d9e4bed0..281f2b99b 100644
--- a/backend/src/graphql/resolver/AdminResolver.test.ts
+++ b/backend/src/graphql/resolver/AdminResolver.test.ts
@@ -17,6 +17,7 @@ import {
   setUserRole,
   deleteUser,
   unDeleteUser,
+  createContribution,
   adminCreateContribution,
   adminCreateContributions,
   adminUpdateContribution,
@@ -77,6 +78,7 @@ afterAll(async () => {
 let admin: User
 let user: User
 let creation: Contribution | void
+let result: any
 
 describe('AdminResolver', () => {
   describe('set user role', () => {
@@ -1365,6 +1367,38 @@ describe('AdminResolver', () => {
             })
           })
 
+          describe('admin deletes own user contribution', () => {
+            beforeAll(async () => {
+              await query({
+                query: login,
+                variables: { email: 'peter@lustig.de', password: 'Aa12345_' },
+              })
+              result = await mutate({
+                mutation: createContribution,
+                variables: {
+                  amount: 100.0,
+                  memo: 'Test env contribution',
+                  creationDate: new Date().toString(),
+                },
+              })
+            })
+
+            it('throws an error', async () => {
+              await expect(
+                mutate({
+                  mutation: adminDeleteContribution,
+                  variables: {
+                    id: result.data.createContribution.id,
+                  },
+                }),
+              ).resolves.toEqual(
+                expect.objectContaining({
+                  errors: [new GraphQLError('Own contribution can not be deleted as admin')],
+                }),
+              )
+            })
+          })
+
           describe('creation id does exist', () => {
             it('returns true', async () => {
               await expect(
diff --git a/backend/src/graphql/resolver/AdminResolver.ts b/backend/src/graphql/resolver/AdminResolver.ts
index 2193fe7a3..4fd85dc0f 100644
--- a/backend/src/graphql/resolver/AdminResolver.ts
+++ b/backend/src/graphql/resolver/AdminResolver.ts
@@ -400,13 +400,24 @@ export class AdminResolver {
 
   @Authorized([RIGHTS.ADMIN_DELETE_CONTRIBUTION])
   @Mutation(() => Boolean)
-  async adminDeleteContribution(@Arg('id', () => Int) id: number): Promise<boolean> {
+  async adminDeleteContribution(
+    @Arg('id', () => Int) id: number,
+    @Ctx() context: Context,
+  ): Promise<boolean> {
     const contribution = await DbContribution.findOne(id)
     if (!contribution) {
       logger.error(`Contribution not found for given id: ${id}`)
       throw new Error('Contribution not found for given id.')
     }
+    const moderator = getUser(context)
+    if (
+      contribution.contributionType === ContributionType.USER &&
+      contribution.userId === moderator.id
+    ) {
+      throw new Error('Own contribution can not be deleted as admin')
+    }
     contribution.contributionStatus = ContributionStatus.DELETED
+    contribution.deletedBy = moderator.id
     await contribution.save()
     const res = await contribution.softRemove()
     return !!res
diff --git a/backend/src/graphql/resolver/ContributionResolver.test.ts b/backend/src/graphql/resolver/ContributionResolver.test.ts
index daf8803d2..323efe5d9 100644
--- a/backend/src/graphql/resolver/ContributionResolver.test.ts
+++ b/backend/src/graphql/resolver/ContributionResolver.test.ts
@@ -17,6 +17,9 @@ import { userFactory } from '@/seeds/factory/user'
 import { creationFactory } from '@/seeds/factory/creation'
 import { creations } from '@/seeds/creation/index'
 import { peterLustig } from '@/seeds/users/peter-lustig'
+import { EventProtocol } from '@entity/EventProtocol'
+import { EventProtocolType } from '@/event/EventProtocolType'
+import { logger } from '@test/testSetup'
 
 let mutate: any, query: any, con: any
 let testEnv: any
@@ -36,6 +39,8 @@ afterAll(async () => {
 })
 
 describe('ContributionResolver', () => {
+  let bibi: any
+
   describe('createContribution', () => {
     describe('unauthenticated', () => {
       it('returns an error', async () => {
@@ -55,7 +60,8 @@ describe('ContributionResolver', () => {
     describe('authenticated with valid user', () => {
       beforeAll(async () => {
         await userFactory(testEnv, bibiBloxberg)
-        await mutate({
+
+        bibi = await mutate({
           mutation: login,
           variables: { email: 'bibi@bloxberg.de', password: 'Aa12345_' },
         })
@@ -85,6 +91,10 @@ describe('ContributionResolver', () => {
           )
         })
 
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith(`memo text is too short: memo.length=4 < (5)`)
+        })
+
         it('throws error when memo length greater than 255 chars', async () => {
           const date = new Date()
           await expect(
@@ -103,6 +113,10 @@ describe('ContributionResolver', () => {
           )
         })
 
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith(`memo text is too long: memo.length=259 > (255)`)
+        })
+
         it('throws error when creationDate not-valid', async () => {
           await expect(
             mutate({
@@ -122,6 +136,13 @@ describe('ContributionResolver', () => {
           )
         })
 
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith(
+            'No information for available creations with the given creationDate=',
+            'Invalid Date',
+          )
+        })
+
         it('throws error when creationDate 3 month behind', async () => {
           const date = new Date()
           await expect(
@@ -141,20 +162,31 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith(
+            'No information for available creations with the given creationDate=',
+            'Invalid Date',
+          )
+        })
       })
 
       describe('valid input', () => {
+        let contribution: any
+
+        beforeAll(async () => {
+          contribution = await mutate({
+            mutation: createContribution,
+            variables: {
+              amount: 100.0,
+              memo: 'Test env contribution',
+              creationDate: new Date().toString(),
+            },
+          })
+        })
+
         it('creates contribution', async () => {
-          await expect(
-            mutate({
-              mutation: createContribution,
-              variables: {
-                amount: 100.0,
-                memo: 'Test env contribution',
-                creationDate: new Date().toString(),
-              },
-            }),
-          ).resolves.toEqual(
+          expect(contribution).toEqual(
             expect.objectContaining({
               data: {
                 createContribution: {
@@ -166,6 +198,17 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        it('stores the create contribution event in the database', async () => {
+          await expect(EventProtocol.find()).resolves.toContainEqual(
+            expect.objectContaining({
+              type: EventProtocolType.CONTRIBUTION_CREATE,
+              amount: expect.decimalEqual(100),
+              contributionId: contribution.data.createContribution.id,
+              userId: bibi.data.login.id,
+            }),
+          )
+        })
       })
     })
   })
@@ -348,6 +391,10 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith('No contribution found to given id')
+        })
       })
 
       describe('Memo length smaller than 5 chars', () => {
@@ -369,6 +416,10 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith('memo text is too short: memo.length=4 < (5)')
+        })
       })
 
       describe('Memo length greater than 255 chars', () => {
@@ -390,6 +441,10 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith('memo text is too long: memo.length=259 > (255)')
+        })
       })
 
       describe('wrong user tries to update the contribution', () => {
@@ -421,6 +476,12 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith(
+            'user of the pending contribution and send user does not correspond',
+          )
+        })
       })
 
       describe('admin tries to update a user contribution', () => {
@@ -442,6 +503,8 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        // TODO check that the error is logged (need to modify AdminResolver, avoid conflicts)
       })
 
       describe('update too much so that the limit is exceeded', () => {
@@ -473,6 +536,12 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith(
+            'The amount (1019 GDD) to be created exceeds the amount (1000 GDD) still available for this month.',
+          )
+        })
       })
 
       describe('update creation to a date that is older than 3 months', () => {
@@ -494,6 +563,13 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith(
+            'No information for available creations with the given creationDate=',
+            'Invalid Date',
+          )
+        })
       })
 
       describe('valid input', () => {
@@ -520,6 +596,22 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        it('stores the update contribution event in the database', async () => {
+          bibi = await query({
+            query: login,
+            variables: { email: 'bibi@bloxberg.de', password: 'Aa12345_' },
+          })
+
+          await expect(EventProtocol.find()).resolves.toContainEqual(
+            expect.objectContaining({
+              type: EventProtocolType.CONTRIBUTION_UPDATE,
+              amount: expect.decimalEqual(10),
+              contributionId: result.data.createContribution.id,
+              userId: bibi.data.login.id,
+            }),
+          )
+        })
       })
     })
   })
@@ -626,9 +718,11 @@ describe('ContributionResolver', () => {
     })
 
     describe('authenticated', () => {
+      let peter: any
       beforeAll(async () => {
         await userFactory(testEnv, bibiBloxberg)
-        await userFactory(testEnv, peterLustig)
+        peter = await userFactory(testEnv, peterLustig)
+
         await mutate({
           mutation: login,
           variables: { email: 'bibi@bloxberg.de', password: 'Aa12345_' },
@@ -663,9 +757,13 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith('Contribution not found for given id')
+        })
       })
 
-      describe('other user sends a deleteContribtuion', () => {
+      describe('other user sends a deleteContribution', () => {
         it('returns an error', async () => {
           await mutate({
             mutation: login,
@@ -684,6 +782,10 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith('Can not delete contribution of another user')
+        })
       })
 
       describe('User deletes own contribution', () => {
@@ -697,6 +799,33 @@ describe('ContributionResolver', () => {
             }),
           ).resolves.toBeTruthy()
         })
+
+        it('stores the delete contribution event in the database', async () => {
+          const contribution = await mutate({
+            mutation: createContribution,
+            variables: {
+              amount: 166.0,
+              memo: 'Whatever contribution',
+              creationDate: new Date().toString(),
+            },
+          })
+
+          await mutate({
+            mutation: deleteContribution,
+            variables: {
+              id: contribution.data.createContribution.id,
+            },
+          })
+
+          await expect(EventProtocol.find()).resolves.toContainEqual(
+            expect.objectContaining({
+              type: EventProtocolType.CONTRIBUTION_DELETE,
+              contributionId: contribution.data.createContribution.id,
+              amount: expect.decimalEqual(166),
+              userId: peter.id,
+            }),
+          )
+        })
       })
 
       describe('User deletes already confirmed contribution', () => {
@@ -728,6 +857,10 @@ describe('ContributionResolver', () => {
             }),
           )
         })
+
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith('A confirmed contribution can not be deleted')
+        })
       })
     })
   })
diff --git a/backend/src/graphql/resolver/ContributionResolver.ts b/backend/src/graphql/resolver/ContributionResolver.ts
index 41af5d249..aec7bc44d 100644
--- a/backend/src/graphql/resolver/ContributionResolver.ts
+++ b/backend/src/graphql/resolver/ContributionResolver.ts
@@ -13,6 +13,13 @@ import { Contribution, ContributionListResult } from '@model/Contribution'
 import { UnconfirmedContribution } from '@model/UnconfirmedContribution'
 import { validateContribution, getUserCreation, updateCreations } from './util/creations'
 import { MEMO_MAX_CHARS, MEMO_MIN_CHARS } from './const/const'
+import {
+  Event,
+  EventContributionCreate,
+  EventContributionDelete,
+  EventContributionUpdate,
+} from '@/event/Event'
+import { eventProtocol } from '@/event/EventProtocolEmitter'
 
 @Resolver()
 export class ContributionResolver {
@@ -23,15 +30,17 @@ export class ContributionResolver {
     @Ctx() context: Context,
   ): Promise<UnconfirmedContribution> {
     if (memo.length > MEMO_MAX_CHARS) {
-      logger.error(`memo text is too long: memo.length=${memo.length} > (${MEMO_MAX_CHARS}`)
+      logger.error(`memo text is too long: memo.length=${memo.length} > (${MEMO_MAX_CHARS})`)
       throw new Error(`memo text is too long (${MEMO_MAX_CHARS} characters maximum)`)
     }
 
     if (memo.length < MEMO_MIN_CHARS) {
-      logger.error(`memo text is too short: memo.length=${memo.length} < (${MEMO_MIN_CHARS}`)
+      logger.error(`memo text is too short: memo.length=${memo.length} < (${MEMO_MIN_CHARS})`)
       throw new Error(`memo text is too short (${MEMO_MIN_CHARS} characters minimum)`)
     }
 
+    const event = new Event()
+
     const user = getUser(context)
     const creations = await getUserCreation(user.id)
     logger.trace('creations', creations)
@@ -49,6 +58,13 @@ export class ContributionResolver {
 
     logger.trace('contribution to save', contribution)
     await dbContribution.save(contribution)
+
+    const eventCreateContribution = new EventContributionCreate()
+    eventCreateContribution.userId = user.id
+    eventCreateContribution.amount = amount
+    eventCreateContribution.contributionId = contribution.id
+    await eventProtocol.writeEvent(event.setEventContributionCreate(eventCreateContribution))
+
     return new UnconfirmedContribution(contribution, user, creations)
   }
 
@@ -58,19 +74,33 @@ export class ContributionResolver {
     @Arg('id', () => Int) id: number,
     @Ctx() context: Context,
   ): Promise<boolean> {
+    const event = new Event()
     const user = getUser(context)
     const contribution = await dbContribution.findOne(id)
     if (!contribution) {
+      logger.error('Contribution not found for given id')
       throw new Error('Contribution not found for given id.')
     }
     if (contribution.userId !== user.id) {
+      logger.error('Can not delete contribution of another user')
       throw new Error('Can not delete contribution of another user')
     }
     if (contribution.confirmedAt) {
+      logger.error('A confirmed contribution can not be deleted')
       throw new Error('A confirmed contribution can not be deleted')
     }
+
     contribution.contributionStatus = ContributionStatus.DELETED
+    contribution.deletedBy = user.id
+    contribution.deletedAt = new Date()
     await contribution.save()
+
+    const eventDeleteContribution = new EventContributionDelete()
+    eventDeleteContribution.userId = user.id
+    eventDeleteContribution.contributionId = contribution.id
+    eventDeleteContribution.amount = contribution.amount
+    await eventProtocol.writeEvent(event.setEventContributionDelete(eventDeleteContribution))
+
     const res = await contribution.softRemove()
     return !!res
   }
@@ -98,6 +128,7 @@ export class ContributionResolver {
       .from(dbContribution, 'c')
       .leftJoinAndSelect('c.messages', 'm')
       .where(where)
+      .withDeleted()
       .orderBy('c.createdAt', order)
       .limit(pageSize)
       .offset((currentPage - 1) * pageSize)
@@ -154,9 +185,11 @@ export class ContributionResolver {
       where: { id: contributionId, confirmedAt: IsNull() },
     })
     if (!contributionToUpdate) {
+      logger.error('No contribution found to given id')
       throw new Error('No contribution found to given id.')
     }
     if (contributionToUpdate.userId !== user.id) {
+      logger.error('user of the pending contribution and send user does not correspond')
       throw new Error('user of the pending contribution and send user does not correspond')
     }
 
@@ -177,6 +210,14 @@ export class ContributionResolver {
     contributionToUpdate.contributionStatus = ContributionStatus.PENDING
     dbContribution.save(contributionToUpdate)
 
+    const event = new Event()
+
+    const eventUpdateContribution = new EventContributionUpdate()
+    eventUpdateContribution.userId = user.id
+    eventUpdateContribution.contributionId = contributionId
+    eventUpdateContribution.amount = amount
+    await eventProtocol.writeEvent(event.setEventContributionUpdate(eventUpdateContribution))
+
     return new UnconfirmedContribution(contributionToUpdate, user, creations)
   }
 }
diff --git a/backend/src/graphql/resolver/TransactionLinkResolver.ts b/backend/src/graphql/resolver/TransactionLinkResolver.ts
index 4724956b4..4ba5dcd0b 100644
--- a/backend/src/graphql/resolver/TransactionLinkResolver.ts
+++ b/backend/src/graphql/resolver/TransactionLinkResolver.ts
@@ -74,10 +74,7 @@ export class TransactionLinkResolver {
     const holdAvailableAmount = amount.minus(calculateDecay(amount, createdDate, validUntil).decay)
 
     // validate amount
-    const sendBalance = await calculateBalance(user.id, holdAvailableAmount.mul(-1), createdDate)
-    if (!sendBalance) {
-      throw new Error("user hasn't enough GDD or amount is < 0")
-    }
+    await calculateBalance(user.id, holdAvailableAmount, createdDate)
 
     const transactionLink = dbTransactionLink.create()
     transactionLink.userId = user.id
diff --git a/backend/src/graphql/resolver/TransactionResolver.test.ts b/backend/src/graphql/resolver/TransactionResolver.test.ts
new file mode 100644
index 000000000..d391f8ab9
--- /dev/null
+++ b/backend/src/graphql/resolver/TransactionResolver.test.ts
@@ -0,0 +1,366 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
+
+import { EventProtocolType } from '@/event/EventProtocolType'
+import { userFactory } from '@/seeds/factory/user'
+import {
+  confirmContribution,
+  createContribution,
+  login,
+  sendCoins,
+} from '@/seeds/graphql/mutations'
+import { bobBaumeister } from '@/seeds/users/bob-baumeister'
+import { garrickOllivander } from '@/seeds/users/garrick-ollivander'
+import { peterLustig } from '@/seeds/users/peter-lustig'
+import { stephenHawking } from '@/seeds/users/stephen-hawking'
+import { EventProtocol } from '@entity/EventProtocol'
+import { Transaction } from '@entity/Transaction'
+import { User } from '@entity/User'
+import { cleanDB, resetToken, testEnvironment } from '@test/helpers'
+import { logger } from '@test/testSetup'
+import { GraphQLError } from 'graphql'
+import { findUserByEmail } from './UserResolver'
+
+let mutate: any, query: any, con: any
+let testEnv: any
+
+beforeAll(async () => {
+  testEnv = await testEnvironment(logger)
+  mutate = testEnv.mutate
+  query = testEnv.query
+  con = testEnv.con
+  await cleanDB()
+})
+
+afterAll(async () => {
+  await cleanDB()
+  await con.close()
+})
+
+let bobData: any
+let peterData: any
+let user: User[]
+
+describe('send coins', () => {
+  beforeAll(async () => {
+    await userFactory(testEnv, peterLustig)
+    await userFactory(testEnv, bobBaumeister)
+    await userFactory(testEnv, stephenHawking)
+    await userFactory(testEnv, garrickOllivander)
+
+    bobData = {
+      email: 'bob@baumeister.de',
+      password: 'Aa12345_',
+    }
+
+    peterData = {
+      email: 'peter@lustig.de',
+      password: 'Aa12345_',
+    }
+
+    user = await User.find({ relations: ['emailContact'] })
+  })
+
+  afterAll(async () => {
+    await cleanDB()
+  })
+
+  describe('unknown recipient', () => {
+    it('throws an error', async () => {
+      await mutate({
+        mutation: login,
+        variables: bobData,
+      })
+      expect(
+        await mutate({
+          mutation: sendCoins,
+          variables: {
+            email: 'wrong@email.com',
+            amount: 100,
+            memo: 'test',
+          },
+        }),
+      ).toEqual(
+        expect.objectContaining({
+          errors: [new GraphQLError('No user with this credentials')],
+        }),
+      )
+    })
+
+    it('logs the error thrown', () => {
+      expect(logger.error).toBeCalledWith(`UserContact with email=wrong@email.com does not exists`)
+    })
+
+    describe('deleted recipient', () => {
+      it('throws an error', async () => {
+        await mutate({
+          mutation: login,
+          variables: peterData,
+        })
+
+        expect(
+          await mutate({
+            mutation: sendCoins,
+            variables: {
+              email: 'stephen@hawking.uk',
+              amount: 100,
+              memo: 'test',
+            },
+          }),
+        ).toEqual(
+          expect.objectContaining({
+            errors: [new GraphQLError('The recipient account was deleted')],
+          }),
+        )
+      })
+
+      it('logs the error thrown', async () => {
+        // find peter to check the log
+        const user = await findUserByEmail(peterData.email)
+        expect(logger.error).toBeCalledWith(
+          `The recipient account was deleted: recipientUser=${user}`,
+        )
+      })
+    })
+
+    describe('recipient account not activated', () => {
+      it('throws an error', async () => {
+        await mutate({
+          mutation: login,
+          variables: peterData,
+        })
+
+        expect(
+          await mutate({
+            mutation: sendCoins,
+            variables: {
+              email: 'garrick@ollivander.com',
+              amount: 100,
+              memo: 'test',
+            },
+          }),
+        ).toEqual(
+          expect.objectContaining({
+            errors: [new GraphQLError('The recipient account is not activated')],
+          }),
+        )
+      })
+
+      it('logs the error thrown', async () => {
+        // find peter to check the log
+        const user = await findUserByEmail(peterData.email)
+        expect(logger.error).toBeCalledWith(
+          `The recipient account is not activated: recipientUser=${user}`,
+        )
+      })
+    })
+  })
+
+  describe('errors in the transaction itself', () => {
+    beforeAll(async () => {
+      await mutate({
+        mutation: login,
+        variables: bobData,
+      })
+    })
+
+    describe('sender and recipient are the same', () => {
+      it('throws an error', async () => {
+        expect(
+          await mutate({
+            mutation: sendCoins,
+            variables: {
+              email: 'bob@baumeister.de',
+              amount: 100,
+              memo: 'test',
+            },
+          }),
+        ).toEqual(
+          expect.objectContaining({
+            errors: [new GraphQLError('Sender and Recipient are the same.')],
+          }),
+        )
+      })
+
+      it('logs the error thrown', () => {
+        expect(logger.error).toBeCalledWith('Sender and Recipient are the same.')
+      })
+    })
+
+    describe('memo text is too long', () => {
+      it('throws an error', async () => {
+        expect(
+          await mutate({
+            mutation: sendCoins,
+            variables: {
+              email: 'peter@lustig.de',
+              amount: 100,
+              memo: 'test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test t',
+            },
+          }),
+        ).toEqual(
+          expect.objectContaining({
+            errors: [new GraphQLError('memo text is too long (255 characters maximum)')],
+          }),
+        )
+      })
+
+      it('logs the error thrown', () => {
+        expect(logger.error).toBeCalledWith('memo text is too long: memo.length=256 > 255')
+      })
+    })
+
+    describe('memo text is too short', () => {
+      it('throws an error', async () => {
+        expect(
+          await mutate({
+            mutation: sendCoins,
+            variables: {
+              email: 'peter@lustig.de',
+              amount: 100,
+              memo: 'test',
+            },
+          }),
+        ).toEqual(
+          expect.objectContaining({
+            errors: [new GraphQLError('memo text is too short (5 characters minimum)')],
+          }),
+        )
+      })
+
+      it('logs the error thrown', () => {
+        expect(logger.error).toBeCalledWith('memo text is too short: memo.length=4 < 5')
+      })
+    })
+
+    describe('user has not enough GDD', () => {
+      it('throws an error', async () => {
+        expect(
+          await mutate({
+            mutation: sendCoins,
+            variables: {
+              email: 'peter@lustig.de',
+              amount: 100,
+              memo: 'testing',
+            },
+          }),
+        ).toEqual(
+          expect.objectContaining({
+            errors: [new GraphQLError(`User has not received any GDD yet`)],
+          }),
+        )
+      })
+
+      it('logs the error thrown', () => {
+        expect(logger.error).toBeCalledWith(
+          `No prior transaction found for user with id: ${user[1].id}`,
+        )
+      })
+    })
+
+    describe('sending negative amount', () => {
+      it('throws an error', async () => {
+        expect(
+          await mutate({
+            mutation: sendCoins,
+            variables: {
+              email: 'peter@lustig.de',
+              amount: -50,
+              memo: 'testing negative',
+            },
+          }),
+        ).toEqual(
+          expect.objectContaining({
+            errors: [new GraphQLError('Transaction amount must be greater than 0')],
+          }),
+        )
+      })
+
+      it('logs the error thrown', () => {
+        expect(logger.error).toBeCalledWith('Transaction amount must be greater than 0: -50')
+      })
+    })
+  })
+
+  describe('user has some GDD', () => {
+    beforeAll(async () => {
+      resetToken()
+
+      // login as bob again
+      await query({ mutation: login, variables: bobData })
+
+      // create contribution as user bob
+      const contribution = await mutate({
+        mutation: createContribution,
+        variables: { amount: 1000, memo: 'testing', creationDate: new Date().toISOString() },
+      })
+
+      // login as admin
+      await query({ mutation: login, variables: peterData })
+
+      // confirm the contribution
+      await mutate({
+        mutation: confirmContribution,
+        variables: { id: contribution.data.createContribution.id },
+      })
+
+      // login as bob again
+      await query({ mutation: login, variables: bobData })
+    })
+
+    describe('good transaction', () => {
+      it('sends the coins', async () => {
+        expect(
+          await mutate({
+            mutation: sendCoins,
+            variables: {
+              email: 'peter@lustig.de',
+              amount: 50,
+              memo: 'unrepeatable memo',
+            },
+          }),
+        ).toEqual(
+          expect.objectContaining({
+            data: {
+              sendCoins: 'true',
+            },
+          }),
+        )
+      })
+
+      it('stores the send transaction event in the database', async () => {
+        // Find the exact transaction (sent one is the one with user[1] as user)
+        const transaction = await Transaction.find({
+          userId: user[1].id,
+          memo: 'unrepeatable memo',
+        })
+
+        expect(EventProtocol.find()).resolves.toContainEqual(
+          expect.objectContaining({
+            type: EventProtocolType.TRANSACTION_SEND,
+            userId: user[1].id,
+            transactionId: transaction[0].id,
+            xUserId: user[0].id,
+          }),
+        )
+      })
+
+      it('stores the receive event in the database', async () => {
+        // Find the exact transaction (received one is the one with user[0] as user)
+        const transaction = await Transaction.find({
+          userId: user[0].id,
+          memo: 'unrepeatable memo',
+        })
+
+        expect(EventProtocol.find()).resolves.toContainEqual(
+          expect.objectContaining({
+            type: EventProtocolType.TRANSACTION_RECEIVE,
+            userId: user[0].id,
+            transactionId: transaction[0].id,
+            xUserId: user[1].id,
+          }),
+        )
+      })
+    })
+  })
+})
diff --git a/backend/src/graphql/resolver/TransactionResolver.ts b/backend/src/graphql/resolver/TransactionResolver.ts
index b00d84de6..f0fb2f452 100644
--- a/backend/src/graphql/resolver/TransactionResolver.ts
+++ b/backend/src/graphql/resolver/TransactionResolver.ts
@@ -6,7 +6,7 @@ import CONFIG from '@/config'
 
 import { Context, getUser } from '@/server/context'
 import { Resolver, Query, Args, Authorized, Ctx, Mutation } from 'type-graphql'
-import { getCustomRepository, getConnection } from '@dbTools/typeorm'
+import { getCustomRepository, getConnection, In } from '@dbTools/typeorm'
 
 import { sendTransactionReceivedEmail } from '@/mailer/sendTransactionReceivedEmail'
 
@@ -37,6 +37,9 @@ import { BalanceResolver } from './BalanceResolver'
 import { MEMO_MAX_CHARS, MEMO_MIN_CHARS } from './const/const'
 import { findUserByEmail } from './UserResolver'
 import { sendTransactionLinkRedeemedEmail } from '@/mailer/sendTransactionLinkRedeemed'
+import { Event, EventTransactionReceive, EventTransactionSend } from '@/event/Event'
+import { eventProtocol } from '@/event/EventProtocolEmitter'
+import { Decay } from '../model/Decay'
 
 export const executeTransaction = async (
   amount: Decimal,
@@ -55,28 +58,19 @@ export const executeTransaction = async (
   }
 
   if (memo.length > MEMO_MAX_CHARS) {
-    logger.error(`memo text is too long: memo.length=${memo.length} > (${MEMO_MAX_CHARS}`)
+    logger.error(`memo text is too long: memo.length=${memo.length} > ${MEMO_MAX_CHARS}`)
     throw new Error(`memo text is too long (${MEMO_MAX_CHARS} characters maximum)`)
   }
 
   if (memo.length < MEMO_MIN_CHARS) {
-    logger.error(`memo text is too short: memo.length=${memo.length} < (${MEMO_MIN_CHARS}`)
+    logger.error(`memo text is too short: memo.length=${memo.length} < ${MEMO_MIN_CHARS}`)
     throw new Error(`memo text is too short (${MEMO_MIN_CHARS} characters minimum)`)
   }
 
   // validate amount
   const receivedCallDate = new Date()
-  const sendBalance = await calculateBalance(
-    sender.id,
-    amount.mul(-1),
-    receivedCallDate,
-    transactionLink,
-  )
-  logger.debug(`calculated Balance=${sendBalance}`)
-  if (!sendBalance) {
-    logger.error(`user hasn't enough GDD or amount is < 0 : balance=${sendBalance}`)
-    throw new Error("user hasn't enough GDD or amount is < 0")
-  }
+
+  const sendBalance = await calculateBalance(sender.id, amount, receivedCallDate, transactionLink)
 
   const queryRunner = getConnection().createQueryRunner()
   await queryRunner.connect()
@@ -106,7 +100,24 @@ export const executeTransaction = async (
     transactionReceive.userId = recipient.id
     transactionReceive.linkedUserId = sender.id
     transactionReceive.amount = amount
-    const receiveBalance = await calculateBalance(recipient.id, amount, receivedCallDate)
+
+    // state received balance
+    let receiveBalance: {
+      balance: Decimal
+      decay: Decay
+      lastTransactionId: number
+    } | null
+
+    // try received balance
+    try {
+      receiveBalance = await calculateBalance(recipient.id, amount, receivedCallDate)
+    } catch (e) {
+      logger.info(
+        `User with no transactions sent: ${recipient.id}, has received a transaction of ${amount} GDD from user: ${sender.id}`,
+      )
+      receiveBalance = null
+    }
+
     transactionReceive.balance = receiveBalance ? receiveBalance.balance : amount
     transactionReceive.balanceDate = receivedCallDate
     transactionReceive.decay = receiveBalance ? receiveBalance.decay.decay : new Decimal(0)
@@ -135,6 +146,20 @@ export const executeTransaction = async (
 
     await queryRunner.commitTransaction()
     logger.info(`commit Transaction successful...`)
+
+    const eventTransactionSend = new EventTransactionSend()
+    eventTransactionSend.userId = transactionSend.userId
+    eventTransactionSend.xUserId = transactionSend.linkedUserId
+    eventTransactionSend.transactionId = transactionSend.id
+    eventTransactionSend.amount = transactionSend.amount.mul(-1)
+    await eventProtocol.writeEvent(new Event().setEventTransactionSend(eventTransactionSend))
+
+    const eventTransactionReceive = new EventTransactionReceive()
+    eventTransactionReceive.userId = transactionReceive.userId
+    eventTransactionReceive.xUserId = transactionReceive.linkedUserId
+    eventTransactionReceive.transactionId = transactionReceive.id
+    eventTransactionReceive.amount = transactionReceive.amount
+    await eventProtocol.writeEvent(new Event().setEventTransactionReceive(eventTransactionReceive))
   } catch (e) {
     await queryRunner.rollbackTransaction()
     logger.error(`Transaction was not successful: ${e}`)
@@ -224,11 +249,11 @@ export class TransactionResolver {
     logger.debug(`involvedUserIds=${involvedUserIds}`)
 
     // We need to show the name for deleted users for old transactions
-    const involvedDbUsers = await dbUser
-      .createQueryBuilder()
-      .withDeleted()
-      .where('id IN (:...userIds)', { userIds: involvedUserIds })
-      .getMany()
+    const involvedDbUsers = await dbUser.find({
+      where: { id: In(involvedUserIds) },
+      withDeleted: true,
+      relations: ['emailContact'],
+    })
     const involvedUsers = involvedDbUsers.map((u) => new User(u))
     logger.debug(`involvedUsers=${involvedUsers}`)
 
@@ -316,6 +341,10 @@ export class TransactionResolver {
     }
     */
     // const recipientUser = await dbUser.findOne({ id: emailContact.userId })
+
+    /* Code inside this if statement is unreachable (useless by so), 
+    in findUserByEmail() an error is already thrown if the user is not found
+    */
     if (!recipientUser) {
       logger.error(`unknown recipient to UserContact: email=${email}`)
       throw new Error('unknown recipient')
diff --git a/backend/src/graphql/resolver/util/creations.ts b/backend/src/graphql/resolver/util/creations.ts
index 4f1cec0e0..9987dfae6 100644
--- a/backend/src/graphql/resolver/util/creations.ts
+++ b/backend/src/graphql/resolver/util/creations.ts
@@ -21,7 +21,7 @@ export const validateContribution = (
   if (index < 0) {
     logger.error(
       'No information for available creations with the given creationDate=',
-      creationDate,
+      creationDate.toString(),
     )
     throw new Error('No information for available creations for the given date')
   }
diff --git a/backend/src/mailer/sendAddedContributionMessageEmail.test.ts b/backend/src/mailer/sendAddedContributionMessageEmail.test.ts
index 1151a0abc..bed8f6214 100644
--- a/backend/src/mailer/sendAddedContributionMessageEmail.test.ts
+++ b/backend/src/mailer/sendAddedContributionMessageEmail.test.ts
@@ -26,7 +26,7 @@ describe('sendAddedContributionMessageEmail', () => {
   it('calls sendEMail', () => {
     expect(sendEMail).toBeCalledWith({
       to: `Bibi Bloxberg <bibi@bloxberg.de>`,
-      subject: 'Gradido Frage zur Schöpfung',
+      subject: 'Rückfrage zu Deinem Gemeinwohl-Beitrag',
       text:
         expect.stringContaining('Hallo Bibi Bloxberg') &&
         expect.stringContaining('Peter Lustig') &&
diff --git a/backend/src/mailer/sendEMail.test.ts b/backend/src/mailer/sendEMail.test.ts
index a6f4bb62a..8e3b0c4a2 100644
--- a/backend/src/mailer/sendEMail.test.ts
+++ b/backend/src/mailer/sendEMail.test.ts
@@ -29,6 +29,7 @@ describe('sendEMail', () => {
   let result: boolean
   describe('config email is false', () => {
     beforeEach(async () => {
+      jest.clearAllMocks()
       result = await sendEMail({
         to: 'receiver@mail.org',
         cc: 'support@gradido.net',
@@ -48,6 +49,7 @@ describe('sendEMail', () => {
 
   describe('config email is true', () => {
     beforeEach(async () => {
+      jest.clearAllMocks()
       CONFIG.EMAIL = true
       result = await sendEMail({
         to: 'receiver@mail.org',
@@ -73,7 +75,7 @@ describe('sendEMail', () => {
     it('calls sendMail of transporter', () => {
       expect((createTransport as jest.Mock).mock.results[0].value.sendMail).toBeCalledWith({
         from: `Gradido (nicht antworten) <${CONFIG.EMAIL_SENDER}>`,
-        to: `${CONFIG.EMAIL_TEST_RECEIVER}`,
+        to: 'receiver@mail.org',
         cc: 'support@gradido.net',
         subject: 'Subject',
         text: 'Text text text',
@@ -84,4 +86,28 @@ describe('sendEMail', () => {
       expect(result).toBeTruthy()
     })
   })
+
+  describe('with email EMAIL_TEST_MODUS true', () => {
+    beforeEach(async () => {
+      jest.clearAllMocks()
+      CONFIG.EMAIL = true
+      CONFIG.EMAIL_TEST_MODUS = true
+      result = await sendEMail({
+        to: 'receiver@mail.org',
+        cc: 'support@gradido.net',
+        subject: 'Subject',
+        text: 'Text text text',
+      })
+    })
+
+    it('calls sendMail of transporter with faked to', () => {
+      expect((createTransport as jest.Mock).mock.results[0].value.sendMail).toBeCalledWith({
+        from: `Gradido (nicht antworten) <${CONFIG.EMAIL_SENDER}>`,
+        to: CONFIG.EMAIL_TEST_RECEIVER,
+        cc: 'support@gradido.net',
+        subject: 'Subject',
+        text: 'Text text text',
+      })
+    })
+  })
 })
diff --git a/backend/src/mailer/text/contributionMessageReceived.ts b/backend/src/mailer/text/contributionMessageReceived.ts
index b0c9c4d30..af1cabb9f 100644
--- a/backend/src/mailer/text/contributionMessageReceived.ts
+++ b/backend/src/mailer/text/contributionMessageReceived.ts
@@ -1,6 +1,6 @@
 export const contributionMessageReceived = {
   de: {
-    subject: 'Gradido Frage zur Schöpfung',
+    subject: 'Rückfrage zu Deinem Gemeinwohl-Beitrag',
     text: (data: {
       senderFirstName: string
       senderLastName: string
diff --git a/backend/src/typeorm/repository/User.ts b/backend/src/typeorm/repository/User.ts
index 8b3e29859..c20ef85ff 100644
--- a/backend/src/typeorm/repository/User.ts
+++ b/backend/src/typeorm/repository/User.ts
@@ -28,8 +28,8 @@ export class UserRepository extends Repository<DbUser> {
   ): Promise<[DbUser[], number]> {
     const query = this.createQueryBuilder('user')
       .select(select)
-      .leftJoinAndSelect('user.emailContact', 'emailContact')
       .withDeleted()
+      .leftJoinAndSelect('user.emailContact', 'emailContact')
       .where(
         new Brackets((qb) => {
           qb.where(
diff --git a/backend/src/util/utilities.ts b/backend/src/util/utilities.ts
index 9abb31554..65214ebb5 100644
--- a/backend/src/util/utilities.ts
+++ b/backend/src/util/utilities.ts
@@ -1,5 +1,17 @@
+import Decimal from 'decimal.js-light'
+
 export const objectValuesToArray = (obj: { [x: string]: string }): Array<string> => {
   return Object.keys(obj).map(function (key) {
     return obj[key]
   })
 }
+
+// to improve code readability, as String is needed, it is handled inside this utility function
+export const decimalAddition = (a: Decimal, b: Decimal): Decimal => {
+  return a.add(b.toString())
+}
+
+// to improve code readability, as String is needed, it is handled inside this utility function
+export const decimalSubtraction = (a: Decimal, b: Decimal): Decimal => {
+  return a.minus(b.toString())
+}
diff --git a/backend/src/util/validate.ts b/backend/src/util/validate.ts
index 8d1c90ca4..9640cc614 100644
--- a/backend/src/util/validate.ts
+++ b/backend/src/util/validate.ts
@@ -5,6 +5,8 @@ import { Decay } from '@model/Decay'
 import { getCustomRepository } from '@dbTools/typeorm'
 import { TransactionLinkRepository } from '@repository/TransactionLink'
 import { TransactionLink as dbTransactionLink } from '@entity/TransactionLink'
+import { decimalSubtraction, decimalAddition } from './utilities'
+import { backendLogger as logger } from '@/server/logger'
 
 function isStringBoolean(value: string): boolean {
   const lowerValue = value.toLowerCase()
@@ -23,14 +25,26 @@ async function calculateBalance(
   amount: Decimal,
   time: Date,
   transactionLink?: dbTransactionLink | null,
-): Promise<{ balance: Decimal; decay: Decay; lastTransactionId: number } | null> {
+): Promise<{ balance: Decimal; decay: Decay; lastTransactionId: number }> {
+  // negative or empty amount should not be allowed
+  if (amount.lessThanOrEqualTo(0)) {
+    logger.error(`Transaction amount must be greater than 0: ${amount}`)
+    throw new Error('Transaction amount must be greater than 0')
+  }
+
+  // check if user has prior transactions
   const lastTransaction = await Transaction.findOne({ userId }, { order: { balanceDate: 'DESC' } })
-  if (!lastTransaction) return null
+
+  if (!lastTransaction) {
+    logger.error(`No prior transaction found for user with id: ${userId}`)
+    throw new Error('User has not received any GDD yet')
+  }
 
   const decay = calculateDecay(lastTransaction.balance, lastTransaction.balanceDate, time)
 
-  // TODO why we have to use toString() here?
-  const balance = decay.balance.add(amount.toString())
+  // new balance is the old balance minus the amount used
+  const balance = decimalSubtraction(decay.balance, amount)
+
   const transactionLinkRepository = getCustomRepository(TransactionLinkRepository)
   const { sumHoldAvailableAmount } = await transactionLinkRepository.summary(userId, time)
 
@@ -38,11 +52,16 @@ async function calculateBalance(
   // else we cannot redeem links which are more or equal to half of what an account actually owns
   const releasedLinkAmount = transactionLink ? transactionLink.holdAvailableAmount : new Decimal(0)
 
-  if (
-    balance.minus(sumHoldAvailableAmount.toString()).plus(releasedLinkAmount.toString()).lessThan(0)
-  ) {
-    return null
+  const availableBalance = decimalSubtraction(balance, sumHoldAvailableAmount)
+
+  if (decimalAddition(availableBalance, releasedLinkAmount).lessThan(0)) {
+    logger.error(
+      `Not enough funds for a transaction of ${amount} GDD, user with id: ${userId} has only ${balance} GDD available`,
+    )
+    throw new Error('Not enough funds for transaction')
   }
+
+  logger.debug(`calculated Balance=${balance}`)
   return { balance, lastTransactionId: lastTransaction.id, decay }
 }
 
diff --git a/database/entity/0050-add_messageId_to_event_protocol/EventProtocol.ts b/database/entity/0050-add_messageId_to_event_protocol/EventProtocol.ts
new file mode 100644
index 000000000..d4dbc526f
--- /dev/null
+++ b/database/entity/0050-add_messageId_to_event_protocol/EventProtocol.ts
@@ -0,0 +1,42 @@
+import Decimal from 'decimal.js-light'
+import { BaseEntity, Entity, PrimaryGeneratedColumn, Column } from 'typeorm'
+import { DecimalTransformer } from '../../src/typeorm/DecimalTransformer'
+
+@Entity('event_protocol')
+export class EventProtocol extends BaseEntity {
+  @PrimaryGeneratedColumn('increment', { unsigned: true })
+  id: number
+
+  @Column({ length: 100, nullable: false, collation: 'utf8mb4_unicode_ci' })
+  type: string
+
+  @Column({ name: 'created_at', type: 'datetime', default: () => 'CURRENT_TIMESTAMP' })
+  createdAt: Date
+
+  @Column({ name: 'user_id', unsigned: true, nullable: false })
+  userId: number
+
+  @Column({ name: 'x_user_id', unsigned: true, nullable: true })
+  xUserId: number
+
+  @Column({ name: 'x_community_id', unsigned: true, nullable: true })
+  xCommunityId: number
+
+  @Column({ name: 'transaction_id', unsigned: true, nullable: true })
+  transactionId: number
+
+  @Column({ name: 'contribution_id', unsigned: true, nullable: true })
+  contributionId: number
+
+  @Column({
+    type: 'decimal',
+    precision: 40,
+    scale: 20,
+    nullable: true,
+    transformer: DecimalTransformer,
+  })
+  amount: Decimal
+
+  @Column({ name: 'message_id', unsigned: true, nullable: true })
+  messageId: number
+}
diff --git a/database/entity/0051-add_delete_by_to_contributions/Contribution.ts b/database/entity/0051-add_delete_by_to_contributions/Contribution.ts
new file mode 100644
index 000000000..32c6f32a3
--- /dev/null
+++ b/database/entity/0051-add_delete_by_to_contributions/Contribution.ts
@@ -0,0 +1,92 @@
+import Decimal from 'decimal.js-light'
+import {
+  BaseEntity,
+  Column,
+  Entity,
+  PrimaryGeneratedColumn,
+  DeleteDateColumn,
+  JoinColumn,
+  ManyToOne,
+  OneToMany,
+} from 'typeorm'
+import { DecimalTransformer } from '../../src/typeorm/DecimalTransformer'
+import { User } from '../User'
+import { ContributionMessage } from '../ContributionMessage'
+
+@Entity('contributions')
+export class Contribution extends BaseEntity {
+  @PrimaryGeneratedColumn('increment', { unsigned: true })
+  id: number
+
+  @Column({ unsigned: true, nullable: false, name: 'user_id' })
+  userId: number
+
+  @ManyToOne(() => User, (user) => user.contributions)
+  @JoinColumn({ name: 'user_id' })
+  user: User
+
+  @Column({ type: 'datetime', default: () => 'CURRENT_TIMESTAMP', name: 'created_at' })
+  createdAt: Date
+
+  @Column({ type: 'datetime', nullable: false, name: 'contribution_date' })
+  contributionDate: Date
+
+  @Column({ length: 255, nullable: false, collation: 'utf8mb4_unicode_ci' })
+  memo: string
+
+  @Column({
+    type: 'decimal',
+    precision: 40,
+    scale: 20,
+    nullable: false,
+    transformer: DecimalTransformer,
+  })
+  amount: Decimal
+
+  @Column({ unsigned: true, nullable: true, name: 'moderator_id' })
+  moderatorId: number
+
+  @Column({ unsigned: true, nullable: true, name: 'contribution_link_id' })
+  contributionLinkId: number
+
+  @Column({ unsigned: true, nullable: true, name: 'confirmed_by' })
+  confirmedBy: number
+
+  @Column({ nullable: true, name: 'confirmed_at' })
+  confirmedAt: Date
+
+  @Column({ unsigned: true, nullable: true, name: 'denied_by' })
+  deniedBy: number
+
+  @Column({ nullable: true, name: 'denied_at' })
+  deniedAt: Date
+
+  @Column({
+    name: 'contribution_type',
+    length: 12,
+    nullable: false,
+    collation: 'utf8mb4_unicode_ci',
+  })
+  contributionType: string
+
+  @Column({
+    name: 'contribution_status',
+    length: 12,
+    nullable: false,
+    collation: 'utf8mb4_unicode_ci',
+  })
+  contributionStatus: string
+
+  @Column({ unsigned: true, nullable: true, name: 'transaction_id' })
+  transactionId: number
+
+  @DeleteDateColumn({ name: 'deleted_at' })
+  deletedAt: Date | null
+
+  @DeleteDateColumn({ unsigned: true, nullable: true, name: 'deleted_by' })
+  deletedBy: number
+
+  @OneToMany(() => ContributionMessage, (message) => message.contribution)
+  @JoinColumn({ name: 'contribution_id' })
+  messages?: ContributionMessage[]
+}
diff --git a/database/entity/Contribution.ts b/database/entity/Contribution.ts
index f6530f00b..4b1dfc9c8 100644
--- a/database/entity/Contribution.ts
+++ b/database/entity/Contribution.ts
@@ -1 +1 @@
-export { Contribution } from './0047-messages_tables/Contribution'
+export { Contribution } from './0051-add_delete_by_to_contributions/Contribution'
diff --git a/database/entity/EventProtocol.ts b/database/entity/EventProtocol.ts
index 4a73f146c..6ebbd3d68 100644
--- a/database/entity/EventProtocol.ts
+++ b/database/entity/EventProtocol.ts
@@ -1 +1 @@
-export { EventProtocol } from './0043-add_event_protocol_table/EventProtocol'
+export { EventProtocol } from './0050-add_messageId_to_event_protocol/EventProtocol'
diff --git a/database/migrations/0050-add_messageId_to_event_protocol.ts b/database/migrations/0050-add_messageId_to_event_protocol.ts
new file mode 100644
index 000000000..ccef98688
--- /dev/null
+++ b/database/migrations/0050-add_messageId_to_event_protocol.ts
@@ -0,0 +1,12 @@
+/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
+/* eslint-disable @typescript-eslint/no-explicit-any */
+
+export async function upgrade(queryFn: (query: string, values?: any[]) => Promise<Array<any>>) {
+  await queryFn(
+    `ALTER TABLE \`event_protocol\` ADD COLUMN \`message_id\` int(10) unsigned NULL DEFAULT NULL;`,
+  )
+}
+
+export async function downgrade(queryFn: (query: string, values?: any[]) => Promise<Array<any>>) {
+  await queryFn(`ALTER TABLE \`event_protocol\` DROP COLUMN \`message_id\`;`)
+}
diff --git a/database/migrations/0051-add_delete_by_to_contributions.ts b/database/migrations/0051-add_delete_by_to_contributions.ts
new file mode 100644
index 000000000..21d0eda97
--- /dev/null
+++ b/database/migrations/0051-add_delete_by_to_contributions.ts
@@ -0,0 +1,12 @@
+/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
+/* eslint-disable @typescript-eslint/no-explicit-any */
+
+export async function upgrade(queryFn: (query: string, values?: any[]) => Promise<Array<any>>) {
+  await queryFn(
+    `ALTER TABLE \`contributions\` ADD COLUMN \`deleted_by\` int(10) unsigned DEFAULT NULL;`,
+  )
+}
+
+export async function downgrade(queryFn: (query: string, values?: any[]) => Promise<Array<any>>) {
+  await queryFn(`ALTER TABLE \`contributions\` DROP COLUMN \`deleted_by\`;`)
+}
diff --git a/database/package.json b/database/package.json
index cabb1b47a..0a97b5135 100644
--- a/database/package.json
+++ b/database/package.json
@@ -1,6 +1,6 @@
 {
   "name": "gradido-database",
-  "version": "1.12.1",
+  "version": "1.13.1",
   "description": "Gradido Database Tool to execute database migrations",
   "main": "src/index.ts",
   "repository": "https://github.com/gradido/gradido/database",
diff --git a/frontend/package.json b/frontend/package.json
index 011193b58..2fc892f9f 100755
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bootstrap-vue-gradido-wallet",
-  "version": "1.12.1",
+  "version": "1.13.1",
   "private": true,
   "scripts": {
     "start": "node run/server.js",
diff --git a/frontend/src/components/ContributionMessages/ContributionMessagesListItem.spec.js b/frontend/src/components/ContributionMessages/ContributionMessagesListItem.spec.js
index 7504854d0..2dc9fb3ce 100644
--- a/frontend/src/components/ContributionMessages/ContributionMessagesListItem.spec.js
+++ b/frontend/src/components/ContributionMessages/ContributionMessagesListItem.spec.js
@@ -175,4 +175,68 @@ describe('ContributionMessagesListItem', () => {
       })
     })
   })
+
+  describe('links in contribtion message', () => {
+    const propsData = {
+      message: {
+        id: 111,
+        message: 'Lorem ipsum?',
+        createdAt: '2022-08-29T12:23:27.000Z',
+        updatedAt: null,
+        type: 'DIALOG',
+        userFirstName: 'Peter',
+        userLastName: 'Lustig',
+        userId: 107,
+        __typename: 'ContributionMessage',
+      },
+    }
+
+    const ModeratorItemWrapper = () => {
+      return mount(ContributionMessagesListItem, {
+        localVue,
+        mocks,
+        propsData,
+      })
+    }
+
+    let messageField
+
+    describe('message of only one link', () => {
+      beforeEach(() => {
+        propsData.message.message = 'https://gradido.net/de/'
+        wrapper = ModeratorItemWrapper()
+        messageField = wrapper.find('div.is-not-moderator.text-right > div:nth-child(4)')
+      })
+
+      it('contains the link as text', () => {
+        expect(messageField.text()).toBe('https://gradido.net/de/')
+      })
+
+      it('contains a link to the given address', () => {
+        expect(messageField.find('a').attributes('href')).toBe('https://gradido.net/de/')
+      })
+    })
+
+    describe('message with text and two links', () => {
+      beforeEach(() => {
+        propsData.message.message = `Here you find all you need to know about Gradido: https://gradido.net/de/
+and here is the link to the repository: https://github.com/gradido/gradido`
+        wrapper = ModeratorItemWrapper()
+        messageField = wrapper.find('div.is-not-moderator.text-right > div:nth-child(4)')
+      })
+
+      it('contains the whole text', () => {
+        expect(messageField.text())
+          .toBe(`Here you find all you need to know about Gradido: https://gradido.net/de/
+and here is the link to the repository: https://github.com/gradido/gradido`)
+      })
+
+      it('contains the two links', () => {
+        expect(messageField.findAll('a').at(0).attributes('href')).toBe('https://gradido.net/de/')
+        expect(messageField.findAll('a').at(1).attributes('href')).toBe(
+          'https://github.com/gradido/gradido',
+        )
+      })
+    })
+  })
 })
diff --git a/frontend/src/components/ContributionMessages/ContributionMessagesListItem.vue b/frontend/src/components/ContributionMessages/ContributionMessagesListItem.vue
index 6c2e555f2..9c7a3a0f2 100644
--- a/frontend/src/components/ContributionMessages/ContributionMessagesListItem.vue
+++ b/frontend/src/components/ContributionMessages/ContributionMessagesListItem.vue
@@ -1,24 +1,29 @@
 <template>
   <div class="contribution-messages-list-item">
     <div v-if="isNotModerator" class="is-not-moderator text-right">
-      <b-avatar :text="initialLetters" variant="info"></b-avatar>
+      <b-avatar variant="info"></b-avatar>
       <span class="ml-2 mr-2">{{ message.userFirstName }} {{ message.userLastName }}</span>
       <span class="ml-2">{{ $d(new Date(message.createdAt), 'short') }}</span>
-      <div class="mt-2">{{ message.message }}</div>
+      <linkify-message :message="message.message"></linkify-message>
     </div>
     <div v-else class="is-moderator text-left">
-      <b-avatar square :text="initialLetters" variant="warning"></b-avatar>
+      <b-avatar square variant="warning"></b-avatar>
       <span class="ml-2 mr-2">{{ message.userFirstName }} {{ message.userLastName }}</span>
       <span class="ml-2">{{ $d(new Date(message.createdAt), 'short') }}</span>
       <small class="ml-4 text-success">{{ $t('community.moderator') }}</small>
-      <div class="mt-2">{{ message.message }}</div>
+      <linkify-message :message="message.message"></linkify-message>
     </div>
   </div>
 </template>
 
 <script>
+import LinkifyMessage from '@/components/ContributionMessages/LinkifyMessage.vue'
+
 export default {
   name: 'ContributionMessagesListItem',
+  components: {
+    LinkifyMessage,
+  },
   props: {
     message: {
       type: Object,
diff --git a/frontend/src/components/ContributionMessages/LinkifyMessage.vue b/frontend/src/components/ContributionMessages/LinkifyMessage.vue
new file mode 100644
index 000000000..5d6ec34cb
--- /dev/null
+++ b/frontend/src/components/ContributionMessages/LinkifyMessage.vue
@@ -0,0 +1,37 @@
+<template>
+  <div class="mt-2">
+    <span v-for="({ type, text }, index) in linkifiedMessage" :key="index">
+      <b-link v-if="type === 'link'" :to="text">{{ text }}</b-link>
+      <span v-else>{{ text }}</span>
+    </span>
+  </div>
+</template>
+
+<script>
+const LINK_REGEX_PATTERN = /(https?:\/\/(www\.)?[-a-zA-Z0-9@:%._+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_+.~#?&//=]*))/i
+
+export default {
+  name: 'LinkifyMessage',
+  props: {
+    message: {
+      type: String,
+      required: true,
+    },
+  },
+  computed: {
+    linkifiedMessage() {
+      const linkified = []
+      let string = this.message
+      let match
+      while ((match = string.match(LINK_REGEX_PATTERN))) {
+        if (match.index > 0)
+          linkified.push({ type: 'text', text: string.substring(0, match.index) })
+        linkified.push({ type: 'link', text: match[0] })
+        string = string.substring(match.index + match[0].length)
+      }
+      if (string.length > 0) linkified.push({ type: 'text', text: string })
+      return linkified
+    },
+  },
+}
+</script>
diff --git a/frontend/src/components/Contributions/ContributionForm.vue b/frontend/src/components/Contributions/ContributionForm.vue
index efe80f494..71593f2b1 100644
--- a/frontend/src/components/Contributions/ContributionForm.vue
+++ b/frontend/src/components/Contributions/ContributionForm.vue
@@ -88,6 +88,8 @@
   </div>
 </template>
 <script>
+const PATTERN_NON_DIGIT = /\D/g
+
 export default {
   name: 'ContributionForm',
   props: {
@@ -104,10 +106,10 @@ export default {
   },
   methods: {
     numberFormat(value) {
-      return value.replace(/\D/g, '')
+      return value.replace(PATTERN_NON_DIGIT, '')
     },
     submit() {
-      this.form.amount = this.numberFormat(this.form.amount)
+      this.form.amount = this.form.amount.replace(PATTERN_NON_DIGIT, '')
       // spreading is needed for testing
       this.$emit(this.form.id ? 'update-contribution' : 'set-contribution', { ...this.form })
       this.reset()
diff --git a/frontend/src/graphql/queries.js b/frontend/src/graphql/queries.js
index f772aa931..1c910a23e 100644
--- a/frontend/src/graphql/queries.js
+++ b/frontend/src/graphql/queries.js
@@ -37,6 +37,7 @@ export const transactionsQuery = gql`
         linkedUser {
           firstName
           lastName
+          email
         }
         decay {
           decay
@@ -44,9 +45,6 @@ export const transactionsQuery = gql`
           end
           duration
         }
-        linkedUser {
-          email
-        }
         transactionLinkId
       }
     }
diff --git a/frontend/src/locales/de.json b/frontend/src/locales/de.json
index a9ad47911..a9aee274d 100644
--- a/frontend/src/locales/de.json
+++ b/frontend/src/locales/de.json
@@ -34,7 +34,7 @@
   "contribution": {
     "activity": "Tätigkeit",
     "alert": {
-      "answerQuestion": "Bitte beantworte die Nachfrage",
+      "answerQuestion": "Bitte beantworte die Rückfrage!",
       "communityNoteList": "Hier findest du alle eingereichten und bestätigten Beiträge von allen Mitgliedern aus dieser Gemeinschaft.",
       "confirm": "bestätigt",
       "in_progress": "Es gibt eine Rückfrage der Moderatoren.",
diff --git a/frontend/src/pages/Community.vue b/frontend/src/pages/Community.vue
index c98bfff2d..786307405 100644
--- a/frontend/src/pages/Community.vue
+++ b/frontend/src/pages/Community.vue
@@ -231,8 +231,6 @@ export default {
           this.items = listContributions.contributionList
           if (this.items.find((item) => item.state === 'IN_PROGRESS')) {
             this.tabIndex = 1
-          } else {
-            this.tabIndex = 0
           }
         })
         .catch((err) => {
diff --git a/package.json b/package.json
index d0b45a8c7..f306a1e06 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "gradido",
-  "version": "1.12.1",
+  "version": "1.13.1",
   "description": "Gradido",
   "main": "index.js",
   "repository": "git@github.com:gradido/gradido.git",