diff --git a/src/cpp/HTTPInterface/UserUpdateGroupPage.cpp b/src/cpp/HTTPInterface/UserUpdateGroupPage.cpp
index 0eed81559..917de70d8 100644
--- a/src/cpp/HTTPInterface/UserUpdateGroupPage.cpp
+++ b/src/cpp/HTTPInterface/UserUpdateGroupPage.cpp
@@ -10,6 +10,9 @@
 
 #include "../controller/Group.h"
 #include "../SingletonManager/SessionManager.h"
+#include "../SingletonManager/PendingTasksManager.h"
+#include "../lib/DataTypeConverter.h"
+#include "../model/gradido/Transaction.h"
 
 enum PageState {
 	PAGE_STATE_OVERVIEW,
@@ -35,17 +38,61 @@ void UserUpdateGroupPage::handleRequest(Poco::Net::HTTPServerRequest& request, P
 	if (_compressResponse) response.set("Content-Encoding", "gzip");
 
 	Poco::Net::HTMLForm form(request, request.stream());
-#line 17 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 20 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 
 	const char* pageName = gettext("Gruppe wählen");
 	auto user = mSession->getNewUser();
 	auto sm = SessionManager::getInstance();
+	auto pt = PendingTasksManager::getInstance();
 	PageState state = PAGE_STATE_OVERVIEW;
+	
+	auto groups = controller::Group::listAll();
+	
 
 	if(!form.empty()) {
+		auto group_id_string = form.get("group_id", "");
+		if(group_id_string == "") {
+			addError(new Error(gettext("Fehler"), gettext("HTML Form Fehler")));
+		} else {
+			int group_id = 0;
+			if(DataTypeConverter::NUMBER_PARSE_OKAY == DataTypeConverter::strToInt(group_id_string, group_id)) {
+				std::string group_alias = "";
+				Poco::AutoPtr<controller::Group> choosen_group;
+				for(auto it = groups.begin(); it != groups.end(); it++) {
+					auto group_model = (*it)->getModel();
+					if(group_model->getID() == group_id) {
+						choosen_group = *it;
+					}
+				}
+				if(choosen_group.isNull()) {
+					addError(new Error(gettext("Fehler"), gettext("Interner Fehler")));
+				} else {
+					auto addGroupMemberTransaction = 
+						model::gradido::Transaction::create(user, choosen_group);
+					response.redirect(ServerConfig::g_serverPath + "/checkTransactions");
+					return;
+					state = PAGE_STATE_REQUEST_IS_RUNNING;
+				}
+			} else {
+				addError(new Error(gettext("Fehler"), gettext("HTML Value Type Fehler")));
+			}
+		}
+	} else {
+		pt->lock("userUpdateGroup Page");
+		if(pt->hasPendingTask(user, model::table::TASK_TYPE_GROUP_ADD_MEMBER)) {
+			state = PAGE_STATE_REQUEST_IS_RUNNING;
+			std::vector<Poco::AutoPtr<controller::PendingTask>> tasks = pt->getPendingTasks(user, model::table::TASK_TYPE_GROUP_ADD_MEMBER);
+			// should be only one
+			Poco::AutoPtr<model::gradido::Transaction> transaction = tasks[0].cast<model::gradido::Transaction>();
+			if(transaction->getSignCount() == 0) {
+				response.redirect(ServerConfig::g_serverPath + "/checkTransactions");
+				return;
+			}
+		}
+		pt->unlock();
 	}
 		
-	auto groups = controller::Group::listAll();
+	
 	
 	
 #line 3 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\header.cpsp"
@@ -105,79 +152,93 @@ void UserUpdateGroupPage::handleRequest(Poco::Net::HTTPServerRequest& request, P
 	responseStream << "            </div>";
 	// end include header.cpsp
 	responseStream << "\n";
-#line 30 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 77 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 	responseStream << ( getErrorsHtml() );
 	responseStream << "\n";
 	responseStream << "<div class=\"content-list\">\n";
 	responseStream << "\t";
-#line 32 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 79 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
  if(PAGE_STATE_OVERVIEW == state ) { 	responseStream << "\n";
 	responseStream << "    <div class=\"content-list-title\">\n";
 	responseStream << "        <h1>";
-#line 34 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 81 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 	responseStream << ( gettext("Gruppe wählen") );
 	responseStream << "</h1>\n";
 	responseStream << "    </div>\n";
 	responseStream << "\t<p>";
-#line 36 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 83 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 	responseStream << ( gettext("Bitte wähle die Gruppe/Gemeinschaft aus, zu der du gehörst.") );
 	responseStream << "</p>\n";
 	responseStream << "\t<p>";
-#line 37 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 84 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 	responseStream << ( gettext("Du bekommst eine Bestätigungsmail, nachdem dein Beitritt bestätigt wurde.") );
 	responseStream << "</p>\n";
 	responseStream << "\t<form method=\"POST\">\n";
 	responseStream << "\t\t<div class=\"content-list-table\">\n";
 	responseStream << "\t\t\t<div class=\"row\">\n";
 	responseStream << "\t\t\t\t<div class=\"cell header-cell c1\">";
-#line 41 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 88 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 	responseStream << ( gettext("Auswahl") );
 	responseStream << "</div>\n";
 	responseStream << "\t\t\t\t<div class=\"cell header-cell c2\">Name</div>\n";
 	responseStream << "\t\t\t\t<div class=\"cell header-cell c2\">Alias</div>\n";
 	responseStream << "\t\t\t\t<div class=\"cell header-cell c3\">Url</div>\n";
 	responseStream << "\t\t\t\t<div class=\"cell header-cell c5\">";
-#line 45 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 92 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 	responseStream << ( gettext("Description") );
 	responseStream << "</div>\n";
 	responseStream << "\t\t\t</div>\n";
 	responseStream << "\t\t\t";
-#line 47 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 94 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
  for(auto it = groups.begin(); it != groups.end(); it++) {
 					auto group_model = (*it)->getModel(); 	responseStream << "\n";
 	responseStream << "\t\t\t\t<div class=\"row\">\n";
 	responseStream << "\t\t\t\t\t<div class=\"cell c1\"><input type=\"radio\" class=\"form-control\" name=\"group_id\" value=\"";
-#line 50 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 97 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 	responseStream << ( group_model->getID());
 	responseStream << "\" /></div>\n";
 	responseStream << "\t\t\t\t\t<div class=\"cell c2\">";
-#line 51 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 98 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 	responseStream << ( group_model->getName() );
 	responseStream << "</div>\n";
 	responseStream << "\t\t\t\t\t<div class=\"cell c2\">";
-#line 52 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 99 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 	responseStream << ( group_model->getAlias() );
 	responseStream << "</div>\n";
 	responseStream << "\t\t\t\t\t<div class=\"cell c3\">";
-#line 53 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 100 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 	responseStream << ( group_model->getUrl() );
 	responseStream << "</div>\n";
 	responseStream << "\t\t\t\t\t<div class=\"cell c5\">";
-#line 54 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 101 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 	responseStream << ( group_model->getDescription());
 	responseStream << "</div>\n";
 	responseStream << "\t\t\t\t</div>\n";
 	responseStream << "\t\t\t";
-#line 56 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 103 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
  } 	responseStream << "\n";
 	responseStream << "\t\t\t<input class=\"grd-form-bn grd-form-bn-succeed grd_clickable\" type=\"submit\" name=\"submit\" value=\"";
-#line 57 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 104 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
 	responseStream << ( gettext("Beitrittsanfrage senden") );
 	responseStream << "\"/>\n";
 	responseStream << "\t\t</div>\n";
 	responseStream << "\t</form>\n";
 	responseStream << "\t";
-#line 60 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+#line 107 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+ } else if(PAGE_STATE_REQUEST_IS_RUNNING == state) { 	responseStream << "\n";
+	responseStream << "\t\t<p>";
+#line 108 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+	responseStream << ( gettext("Deine Beitrittsanfrage wird bearbeitet, du bekommst eine E-Mail wenn sie bestätigt oder abgelehnt wurde.") );
+	responseStream << "</p>\n";
+	responseStream << "\t\t<p><a href=\"";
+#line 109 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+	responseStream << ( ServerConfig::g_serverPath );
+	responseStream << "/logout\">";
+#line 109 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
+	responseStream << ( gettext("Abmelden") );
+	responseStream << "</a></p>\n";
+	responseStream << "\t";
+#line 110 "F:\\Gradido\\gradido_login_server\\src\\cpsp\\userUpdateGroup.cpsp"
  } 	responseStream << "\n";
 	responseStream << "</div>\n";
 	// begin include footer.cpsp
diff --git a/src/cpp/SingletonManager/PendingTasksManager.cpp b/src/cpp/SingletonManager/PendingTasksManager.cpp
index 54fd18402..e90361d75 100644
--- a/src/cpp/SingletonManager/PendingTasksManager.cpp
+++ b/src/cpp/SingletonManager/PendingTasksManager.cpp
@@ -64,4 +64,44 @@ const PendingTasksManager::PendingTaskList* PendingTasksManager::getTaskListForU
 		return it->second;
 	}
 	return nullptr;
-}
\ No newline at end of file
+}
+
+bool PendingTasksManager::hasPendingTask(Poco::AutoPtr<controller::User> user, model::table::TaskType type)
+{
+	auto model = user->getModel();
+	int user_id = model->getID();
+	Poco::ScopedLock<Poco::Mutex> _lock(mWorkMutex);
+	auto it = mPendingTasks.find(user_id);
+	if (it != mPendingTasks.end()) {
+		auto task_list = it->second;
+		for (auto task = task_list->begin(); task != task_list->end(); it++) {
+			auto task_model = (*task)->getModel();
+			if (type == task_model->getTaskType()) {
+				return true;
+			}
+		}
+	}
+	return false;
+
+}
+
+std::vector<Poco::AutoPtr<controller::PendingTask>> PendingTasksManager::getPendingTasks(Poco::AutoPtr<controller::User> user, model::table::TaskType type)
+{
+	auto model = user->getModel();
+	int user_id = model->getID();
+	Poco::ScopedLock<Poco::Mutex> _lock(mWorkMutex);
+	std::vector<Poco::AutoPtr<controller::PendingTask>> results;
+
+	auto it = mPendingTasks.find(user_id);
+	if (it != mPendingTasks.end()) {
+		auto task_list = it->second;
+		results.reserve(task_list->size());
+		for (auto taskIt = task_list->begin(); taskIt != task_list->end(); taskIt++) {
+			auto task_model = (*taskIt)->getModel();
+			if (type == task_model->getTaskType()) {
+				results.push_back(*taskIt);
+			}
+		}
+	}
+	return results;
+}
diff --git a/src/cpp/SingletonManager/PendingTasksManager.h b/src/cpp/SingletonManager/PendingTasksManager.h
index 3cfbf1b2a..c09c377da 100644
--- a/src/cpp/SingletonManager/PendingTasksManager.h
+++ b/src/cpp/SingletonManager/PendingTasksManager.h
@@ -14,6 +14,7 @@
 #define GRADIDO_LOGIN_SERVER_SINGLETON_MANAGER_PENDING_TASKS_MANAGER
 
 #include "../controller/PendingTask.h"
+#include "../controller/User.h"
 
 class PendingTasksManager: public UniLib::lib::MultithreadContainer
 {
@@ -35,6 +36,8 @@ public:
 	//! and unlock afterwards
 	//! \return list or nullptr if no list for user exist
 	const PendingTaskList* getTaskListForUser(int userId) const;
+	bool hasPendingTask(Poco::AutoPtr<controller::User> user, model::table::TaskType type);
+	std::vector<Poco::AutoPtr<controller::PendingTask>> getPendingTasks(Poco::AutoPtr<controller::User> user, model::table::TaskType type);
 
 protected:
 	PendingTasksManager();
diff --git a/src/cpp/controller/User.h b/src/cpp/controller/User.h
index cd213c175..90c42357d 100644
--- a/src/cpp/controller/User.h
+++ b/src/cpp/controller/User.h
@@ -143,6 +143,9 @@ namespace controller {
 
 		inline void setBalance(int gradidoBalance) { std::unique_lock<std::shared_mutex> _lock(mSharedMutex); mGradidoCurrentBalance = gradidoBalance; }
 		inline int getBalance() { std::shared_lock<std::shared_mutex> _lock(mSharedMutex); return mGradidoCurrentBalance; }
+
+		// connection to other tables
+
 		
 	protected:
 
diff --git a/src/cpp/model/gradido/GroupMemberUpdate.cpp b/src/cpp/model/gradido/GroupMemberUpdate.cpp
index 1d922311f..89f77c68d 100644
--- a/src/cpp/model/gradido/GroupMemberUpdate.cpp
+++ b/src/cpp/model/gradido/GroupMemberUpdate.cpp
@@ -39,6 +39,7 @@ namespace model {
 					{
 						// no current user in group, at least login server known, so we need only one signature for transaction
 						// TODO: maybe check with node server, but maybe it isn't necessary
+						// check sequence number in topic db entry, should be <= 1
 						mMinSignatureCount = 1;
 						
 					}
diff --git a/src/cpp/model/gradido/Transaction.cpp b/src/cpp/model/gradido/Transaction.cpp
index 0606a0d31..143ce54b5 100644
--- a/src/cpp/model/gradido/Transaction.cpp
+++ b/src/cpp/model/gradido/Transaction.cpp
@@ -7,7 +7,9 @@ namespace model {
 		Transaction::Transaction(Poco::AutoPtr<TransactionBody> body)
 			: mTransactionBody(body), mBodyBytesHash(0)
 		{
-			
+			auto body_bytes = mTransactionBody->getBodyBytes();
+			mBodyBytesHash = DRMakeStringHash(body_bytes.data(), body_bytes.size());
+			mProtoTransaction.set_body_bytes(body_bytes);
 		}
 
 		Transaction::Transaction(const std::string& protoMessageBin, model::table::PendingTask* dbModel)
@@ -63,7 +65,7 @@ namespace model {
 			}
 			model->setUserId(user->getModel()->getID());
 			model->setTaskType(type);
-			model->setRequest(mProtoTransaction.body_bytes());
+			model->setRequest(mProtoTransaction.SerializeAsString());
 			if (!model->insertIntoDB(true)) {
 				return false;
 			}
diff --git a/src/cpp/model/gradido/Transaction.h b/src/cpp/model/gradido/Transaction.h
index 21490e4c4..4c2e8ef96 100644
--- a/src/cpp/model/gradido/Transaction.h
+++ b/src/cpp/model/gradido/Transaction.h
@@ -29,6 +29,7 @@ namespace model {
 			static Poco::AutoPtr<Transaction> load(model::table::PendingTask* dbModel);
 
 			bool addSign(Poco::AutoPtr<controller::User> user);
+			int getSignCount() { return mProtoTransaction.sig_map().sigpair_size(); }
 			TransactionValidation validate();
 			
 			inline Poco::AutoPtr<TransactionBody> getTransactionBody() { Poco::ScopedLock<Poco::Mutex> _lock(mWorkMutex); return mTransactionBody; }
diff --git a/src/cpsp/userUpdateGroup.cpsp b/src/cpsp/userUpdateGroup.cpsp
index 90bcbcd68..40b13c616 100644
--- a/src/cpsp/userUpdateGroup.cpsp
+++ b/src/cpsp/userUpdateGroup.cpsp
@@ -7,6 +7,9 @@
 
 #include "../controller/Group.h"
 #include "../SingletonManager/SessionManager.h"
+#include "../SingletonManager/PendingTasksManager.h"
+#include "../lib/DataTypeConverter.h"
+#include "../model/gradido/Transaction.h"
 
 enum PageState {
 	PAGE_STATE_OVERVIEW,
@@ -18,12 +21,56 @@ enum PageState {
 	const char* pageName = gettext("Gruppe wählen");
 	auto user = mSession->getNewUser();
 	auto sm = SessionManager::getInstance();
+	auto pt = PendingTasksManager::getInstance();
 	PageState state = PAGE_STATE_OVERVIEW;
+	
+	auto groups = controller::Group::listAll();
+	
 
 	if(!form.empty()) {
+		auto group_id_string = form.get("group_id", "");
+		if(group_id_string == "") {
+			addError(new Error(gettext("Fehler"), gettext("HTML Form Fehler")));
+		} else {
+			int group_id = 0;
+			if(DataTypeConverter::NUMBER_PARSE_OKAY == DataTypeConverter::strToInt(group_id_string, group_id)) {
+				std::string group_alias = "";
+				Poco::AutoPtr<controller::Group> choosen_group;
+				for(auto it = groups.begin(); it != groups.end(); it++) {
+					auto group_model = (*it)->getModel();
+					if(group_model->getID() == group_id) {
+						choosen_group = *it;
+					}
+				}
+				if(choosen_group.isNull()) {
+					addError(new Error(gettext("Fehler"), gettext("Interner Fehler")));
+				} else {
+					auto addGroupMemberTransaction = 
+						model::gradido::Transaction::create(user, choosen_group);
+					response.redirect(ServerConfig::g_serverPath + "/checkTransactions");
+					return;
+					state = PAGE_STATE_REQUEST_IS_RUNNING;
+				}
+			} else {
+				addError(new Error(gettext("Fehler"), gettext("HTML Value Type Fehler")));
+			}
+		}
+	} else {
+		pt->lock("userUpdateGroup Page");
+		if(pt->hasPendingTask(user, model::table::TASK_TYPE_GROUP_ADD_MEMBER)) {
+			state = PAGE_STATE_REQUEST_IS_RUNNING;
+			std::vector<Poco::AutoPtr<controller::PendingTask>> tasks = pt->getPendingTasks(user, model::table::TASK_TYPE_GROUP_ADD_MEMBER);
+			// should be only one
+			Poco::AutoPtr<model::gradido::Transaction> transaction = tasks[0].cast<model::gradido::Transaction>();
+			if(transaction->getSignCount() == 0) {
+				response.redirect(ServerConfig::g_serverPath + "/checkTransactions");
+				return;
+			}
+		}
+		pt->unlock();
 	}
 		
-	auto groups = controller::Group::listAll();
+	
 	
 	
 %><%@ include file="header.cpsp" %>
@@ -57,6 +104,9 @@ enum PageState {
 			<input class="grd-form-bn grd-form-bn-succeed grd_clickable" type="submit" name="submit" value="<%= gettext("Beitrittsanfrage senden") %>"/>
 		</div>
 	</form>
+	<% } else if(PAGE_STATE_REQUEST_IS_RUNNING == state) { %>
+		<p><%= gettext("Deine Beitrittsanfrage wird bearbeitet, du bekommst eine E-Mail wenn sie bestätigt oder abgelehnt wurde.") %></p>
+		<p><a href="<%= ServerConfig::g_serverPath %>/logout"><%= gettext("Abmelden") %></a></p>
 	<% } %>
 </div>
 <%@ include file="footer.cpsp" %>