diff --git a/application/Api/v1/PreorderApicontroller.php b/application/Api/v1/PreorderApicontroller.php
index e6dcb675d..628886196 100644
--- a/application/Api/v1/PreorderApicontroller.php
+++ b/application/Api/v1/PreorderApicontroller.php
@@ -14,6 +14,7 @@ class PreorderApicontroller extends mfBaseApicontroller {
   private $hausnummer_add_zusatz = false;
   private $exist_is_error = false;
   private $require_connectiontype = false;
+  private $allow_unit_update = false;
   
   protected function init() {
     $db = $this->db(ADDRESSDB_DBHOST, ADDRESSDB_DBUSER, ADDRESSDB_DBPASS, ADDRESSDB_DBNAME);
@@ -59,6 +60,9 @@ class PreorderApicontroller extends mfBaseApicontroller {
         if($campaign->require_connectiontype == 1) {
           $this->require_connectiontype = true;
         }
+        if($campaign->allow_unit_update == 1) {
+          $this->allow_unit_update = true;
+        }
         
       }
       
@@ -155,7 +159,7 @@ class PreorderApicontroller extends mfBaseApicontroller {
     }
     
     $shipping_address = "customer";
-    if(array_key_exists("is_shipping", $this->post['address']) && $this->post['address']['is_shipping']) {
+    if(property_exists($this->post['address'], "is_shipping") && $this->post['address']->is_shipping) {
       $shipping_address = "address";
     }
     
@@ -236,6 +240,7 @@ class PreorderApicontroller extends mfBaseApicontroller {
     /* 
      * search wohneinheit
      */
+    $update_unit = false;
     $where = "1=1 ";
     $unit = false;
     if(count($unit_search)) {
@@ -277,6 +282,7 @@ class PreorderApicontroller extends mfBaseApicontroller {
       $res = $this->db()->query($sql);
       if($this->db()->num_rows($res)) {
         $unit = $this->db()->fetch_object($res);
+        $update_unit = true;
       }
     }
     
@@ -440,6 +446,14 @@ class PreorderApicontroller extends mfBaseApicontroller {
       return mfResponse::InternalServerError();
     }
     
+    // update wohneinheit if allowed
+    /*if($this->allow_unit_update && $update_unit) {
+      var_dump($unit_search);
+      var_dump($unit);
+      exit;
+    }*/
+    
+    
     $return = ["code" => $preorder->ucode];
     if($addon_data) {
       $return["additionalData"] = $addon_data;