diff --git a/services/backup/src/Reactors/server/CreateNewBackupReactor.h b/services/backup/src/Reactors/server/CreateNewBackupReactor.h
--- a/services/backup/src/Reactors/server/CreateNewBackupReactor.h
+++ b/services/backup/src/Reactors/server/CreateNewBackupReactor.h
@@ -40,7 +40,7 @@
   std::condition_variable blobPutDoneCV;
   std::mutex blobPutDoneCVMutex;
 
-  std::string generateBackupID();
+  std::string generateBackupID(const std::string &userID);
 
 public:
   std::unique_ptr<ServerBidiReactorStatus> handleRequest(
diff --git a/services/backup/src/Reactors/server/CreateNewBackupReactor.cpp b/services/backup/src/Reactors/server/CreateNewBackupReactor.cpp
--- a/services/backup/src/Reactors/server/CreateNewBackupReactor.cpp
+++ b/services/backup/src/Reactors/server/CreateNewBackupReactor.cpp
@@ -8,9 +8,10 @@
 namespace network {
 namespace reactor {
 
-std::string CreateNewBackupReactor::generateBackupID() {
-  // mock
-  return generateRandomString();
+std::string
+CreateNewBackupReactor::generateBackupID(const std::string &userID) {
+  return generateUUID() + ID_SEPARATOR +
+      std::to_string(getCurrentTimestamp());
 }
 
 std::unique_ptr<ServerBidiReactorStatus> CreateNewBackupReactor::handleRequest(
@@ -45,7 +46,13 @@
       this->state = State::DATA_CHUNKS;
 
       // TODO confirm - holder may be a backup id
-      this->backupID = this->generateBackupID();
+      this->backupID = this->generateBackupID(this->userID);
+      if (database::DatabaseManager::getInstance().findBackupItem(
+              this->userID, this->backupID) != nullptr) {
+        throw std::runtime_error(
+            "Backup with id [" + this->backupID + "] for user [" +
+            this->userID + "] already exists, creation aborted");
+      }
       response->set_backupid(this->backupID);
       this->holder = this->backupID;
       this->putReactor = std::make_shared<reactor::BlobPutClientReactor>(
diff --git a/services/lib/src/GlobalTools.h b/services/lib/src/GlobalTools.h
--- a/services/lib/src/GlobalTools.h
+++ b/services/lib/src/GlobalTools.h
@@ -6,6 +6,8 @@
 namespace comm {
 namespace network {
 
+const std::string ID_SEPARATOR = ":";
+
 uint64_t getCurrentTimestamp();
 
 bool hasEnvFlag(const std::string &flag);