diff --git a/src/Entity/Customer.php b/src/Entity/Customer.php
index 4af84d96..23a49082 100644
--- a/src/Entity/Customer.php
+++ b/src/Entity/Customer.php
@@ -222,6 +222,12 @@ class Customer
      */
     protected $car_club_customer_hub;
 
+    // random generated unique id
+    /**
+     * @ORM\Column(type="string", length=40, nullable=true)
+     */
+    protected $generated_id;
+
     public function __construct()
     {
         $this->numbers = new ArrayCollection();
@@ -259,6 +265,8 @@ class Customer
         $this->date_create = new DateTime();
 
         $this->create_source = 'unknown';
+
+        $this->generated_id = '';
     }
 
     public function getID()
@@ -674,4 +682,5 @@ class Customer
     {
         return $this->car_club_customer_hub;
     }
+
 }
diff --git a/src/Service/UniqueIdGenerator.php b/src/Service/UniqueIdGenerator.php
index c0a91d0c..7822e045 100644
--- a/src/Service/UniqueIdGenerator.php
+++ b/src/Service/UniqueIdGenerator.php
@@ -13,10 +13,28 @@ class UniqueIdGenerator
         $this->em = $em;
     }
 
-    public function generateUniqueId($str_length)
+    public function generateCustomerUniqueId($str_length)
     {
-        // TODO: retry until we get a unique id
+        // retry until we get a unique id
+        while (true)
+        {
+            try
+            {
+            }
+            catch (DBALException $e)
+            {
+                error_log($e->getMessage());
+                // delay one second and try again
+                sleep(1);
+                continue;
+            }
 
+            break;
+        }
+    }
+
+    protected function generateUniqueId($str_length)
+    {
         return substr(md5(time()), 0, $str_length);
     }
 }