diff --git a/backend/src/middleware/validation/validationMiddleware.js b/backend/src/middleware/validation/validationMiddleware.js
index ff3992ead..1dbd36b72 100644
--- a/backend/src/middleware/validation/validationMiddleware.js
+++ b/backend/src/middleware/validation/validationMiddleware.js
@@ -78,10 +78,7 @@ const validateReport = async (resolve, root, args, context, info) => {
     }
   })
 
-  if (existingReportedResource)
-    throw new Error(
-      `You have already reported the ${existingReportedResource.label}, please only report the same ${existingReportedResource.label} once`,
-    )
+  if (existingReportedResource) throw new Error(`${existingReportedResource.label}`)
   return resolve(root, args, context, info)
 }
 
diff --git a/webapp/components/Modal/ReportModal.vue b/webapp/components/Modal/ReportModal.vue
index c33515a37..9b155e8b6 100644
--- a/webapp/components/Modal/ReportModal.vue
+++ b/webapp/components/Modal/ReportModal.vue
@@ -8,9 +8,8 @@
 
     <!-- eslint-disable-next-line vue/no-v-html -->
     <p v-html="message" />
-
     <ds-radio
-      :value="form.reasonCategory"
+      v-model="form.reasonCategory"
       :schema="formSchema.reasonCategory"
       :label="$t('report.reason.category.label')"
       :options="form.reasonCategoryOptions"
@@ -18,7 +17,7 @@
     />
     <ds-input
       class="reason-description"
-      :value="form.reasonDescription"
+      v-model="form.reasonDescription"
       :schema="formSchema.reasonDescription"
       :label="$t('report.reason.description.label')"
       :placeholder="$t('report.reason.description.placeholder')"
@@ -29,15 +28,16 @@
       {{ form.reasonDescription.length }}/{{ formSchema.reasonDescription.max }}
     </small>
     <ds-space />
-
-    <template slot="footer">
-      <ds-button class="cancel" icon="close" @click="cancel">{{ $t('report.cancel') }}</ds-button>
+    <template #footer>
+      <ds-button class="cancel" icon="close" @click="cancel">
+        {{ $t('report.cancel') }}
+      </ds-button>
 
       <ds-button
         danger
         class="confirm"
         icon="exclamation-circle"
-        :disabled="failsValidations"
+        :disabled="!form.reasonCategory"
         :loading="loading"
         @click="confirm"
       >
@@ -50,6 +50,8 @@
 <script>
 import { SweetalertIcon } from 'vue-sweetalert-icons'
 import { reportMutation } from '~/graphql/Moderation.js'
+import { valuesReasonCategoryOptions } from '~/constants/modals.js'
+import validReport from '~/components/utils/ReportModal'
 
 export default {
   name: 'ReportModal',
@@ -62,58 +64,25 @@ export default {
     id: { type: String, required: true },
   },
   data() {
-    // this list equals to enums in GraphQL schema file "backend/src/schema/types/type/REPORTED.gql"
-    let valuesReasonCategoryOptions = [
-      'discrimination_etc',
-      'pornographic_content_links',
-      'glorific_trivia_of_cruel_inhuman_acts',
-      'doxing',
-      'intentional_intimidation_stalking_persecution',
-      'advert_products_services_commercial',
-      'criminal_behavior_violation_german_law',
-      'other',
-    ]
-
-    let reasonCategoryOptions = []
-    valuesReasonCategoryOptions.forEach(reasonCategory => {
-      reasonCategoryOptions.push({
-        label: this.$t('report.reason.category.options.' + reasonCategory),
-        value: reasonCategory,
-      })
-    })
-
     return {
       isOpen: true,
       success: false,
       loading: false,
-      failsValidations: true,
       form: {
         reasonCategory: null,
-        reasonCategoryOptions,
+        reasonCategoryOptions: [],
         reasonDescription: '',
       },
-      formSchema: {
-        reasonCategory: {
-          type: 'enum',
-          required: true,
-          validator: (rule, value, callback, source, options) => {
-            this.form.reasonCategory = value
-            this.failsValidations = !this.form.reasonCategory
-            callback()
-          },
-        },
-        reasonDescription: {
-          type: 'string',
-          min: 0,
-          max: 200,
-          validator: (rule, value, callback, source, options) => {
-            this.form.reasonDescription = value
-            callback()
-          },
-        },
-      },
     }
   },
+  created() {
+    this.form.reasonCategoryOptions = valuesReasonCategoryOptions.map(reasonCategory => {
+      return {
+        label: this.$t('report.reason.category.options.' + reasonCategory),
+        value: reasonCategory,
+      }
+    })
+  },
   computed: {
     title() {
       return this.$t(`report.${this.type}.title`)
@@ -122,6 +91,12 @@ export default {
       const name = this.$filters.truncate(this.name, 30)
       return this.$t(`report.${this.type}.message`, { name })
     },
+    formSchema() {
+      const validReportSchema = validReport({ translate: this.$t })
+      return {
+        ...validReportSchema.formSchema,
+      }
+    },
   },
   methods: {
     async cancel() {
@@ -134,7 +109,6 @@ export default {
     },
     async confirm() {
       const { reasonCategory, reasonDescription } = this.form
-
       this.loading = true
       // TODO: Use the "modalData" structure introduced in "ConfirmModal" and refactor this here. Be aware that all the Jest tests have to be refactored as well !!!
       // await this.modalData.buttons.confirm.callback()
@@ -172,6 +146,8 @@ export default {
             case 'GraphQL error: Comment':
               this.$toast.error(this.$t('report.comment.error'))
               break
+            default:
+              this.$toast.error(err.message)
           }
           this.loading = false
         })
diff --git a/webapp/components/utils/ReportModal.js b/webapp/components/utils/ReportModal.js
new file mode 100644
index 000000000..da40704ad
--- /dev/null
+++ b/webapp/components/utils/ReportModal.js
@@ -0,0 +1,25 @@
+import { valuesReasonCategoryOptions } from '~/constants/modals.js'
+
+export default function validReport({ translate }) {
+  return {
+    formSchema: {
+      reasonCategory: {
+        type: 'object',
+        required: true,
+        fields: {
+          value: {
+            type: 'enum',
+            enum: valuesReasonCategoryOptions,
+            required: true,
+            message: translate('report.reason.category.invalid'),
+          },
+        },
+      },
+      reasonDescription: {
+        type: 'string',
+        min: 0,
+        max: 200,
+      },
+    },
+  }
+}
diff --git a/webapp/components/utils/ReportModal.spec.js b/webapp/components/utils/ReportModal.spec.js
new file mode 100644
index 000000000..de4277c4c
--- /dev/null
+++ b/webapp/components/utils/ReportModal.spec.js
@@ -0,0 +1,36 @@
+import validReport from './ReportModal'
+import Schema from 'async-validator'
+
+let translate
+
+beforeEach(() => {
+  translate = jest.fn(() => 'Validation error')
+})
+
+describe('validReport', () => {
+  let validate = object => {
+    const { formSchema } = validReport({ translate })
+    const validator = new Schema(formSchema)
+    return validator.validate(object, { suppressWarning: true }).catch(({ errors }) => {
+      throw new Error(errors[0].message)
+    })
+  }
+
+  describe('reasonCategory', () => {
+    describe('invalid enum', () => {
+      it('rejects', async () => {
+        await expect(validate({ reasonCategory: { value: 'invalid_enum' } })).rejects.toThrow(
+          'Validation error',
+        )
+      })
+    })
+
+    describe('valid enum', () => {
+      it('resolves', async () => {
+        await expect(
+          validate({ reasonCategory: { value: 'discrimination_etc' } }),
+        ).resolves.toBeUndefined()
+      })
+    })
+  })
+})
diff --git a/webapp/constants/modals.js b/webapp/constants/modals.js
new file mode 100644
index 000000000..f1d08fdc3
--- /dev/null
+++ b/webapp/constants/modals.js
@@ -0,0 +1,11 @@
+// this list equals to enums in GraphQL schema file "backend/src/schema/types/type/REPORTED.gql"
+export const valuesReasonCategoryOptions = [
+  'discrimination_etc',
+  'pornographic_content_links',
+  'glorific_trivia_of_cruel_inhuman_acts',
+  'doxing',
+  'intentional_intimidation_stalking_persecution',
+  'advert_products_services_commercial',
+  'criminal_behavior_violation_german_law',
+  'other',
+]
diff --git a/webapp/locales/de.json b/webapp/locales/de.json
index 9b5bfb934..ceffeb99c 100644
--- a/webapp/locales/de.json
+++ b/webapp/locales/de.json
@@ -507,7 +507,8 @@
           "advert_products_services_commercial": "Bewerben von Produkten und Dienstleistungen mit kommerzieller Absicht.",
           "criminal_behavior_violation_german_law": "Strafbares Verhalten bzw. Verstoß gegen deutsches Recht.",
           "other": "Andere …"
-        }
+        },
+        "invalid": "Bitte wählen Sie eine gültige Kategorie aus"
       },
       "description": {
         "label": "Bitte erkläre: Warum möchtest du dies melden?",
diff --git a/webapp/locales/en.json b/webapp/locales/en.json
index 43fb9239f..b36e99272 100644
--- a/webapp/locales/en.json
+++ b/webapp/locales/en.json
@@ -508,7 +508,8 @@
           "advert_products_services_commercial": "Advertising products and services with commercial intent.",
           "criminal_behavior_violation_german_law": "Criminal behavior or violation of German law.",
           "other": "Other …"
-        }
+        },
+        "invalid": "Please select a valid category"
       },
       "description": {
         "label": "Please explain: Why you like to report this?",
diff --git a/webapp/pages/moderation/index.vue b/webapp/pages/moderation/index.vue
index 535b2613c..ab72c0588 100644
--- a/webapp/pages/moderation/index.vue
+++ b/webapp/pages/moderation/index.vue
@@ -67,7 +67,7 @@
       <template slot="reasonCategory" slot-scope="scope">
         {{ $t('report.reason.category.options.' + scope.row.reasonCategory) }}
       </template>
-      <!-- reasonCategory -->
+      <!-- reasonDescription -->
       <template slot="reasonDescription" slot-scope="scope">
         {{ scope.row.reasonDescription }}
       </template>