diff --git a/workflow/engine/src/ProcessMaker/BusinessModel/Light.php b/workflow/engine/src/ProcessMaker/BusinessModel/Light.php
index f8b476545..c2015ae7d 100644
--- a/workflow/engine/src/ProcessMaker/BusinessModel/Light.php
+++ b/workflow/engine/src/ProcessMaker/BusinessModel/Light.php
@@ -723,6 +723,7 @@ class Light
      */
     public function documentUploadFiles($userUid, $app_uid, $app_doc_uid, $request_data)
     {
+        $response = array("status" => "fail");
         if (isset( $_FILES["form"]["name"] ) && count( $_FILES["form"]["name"] ) > 0) {
             $arrayField = array ();
             $arrayFileName = array ();
@@ -773,6 +774,7 @@ class Light
                         $sPathName = PATH_DOCUMENT . $pathUID . PATH_SEP;
                         $sFileName = $sAppDocUid . "_" . $iDocVersion . "." . $sExtension;
                         G::uploadFile( $arrayFileTmpName[$i], $sPathName, $sFileName );
+                        $response = array("status" => "ok");
                     }
                 }
             }
@@ -780,4 +782,31 @@ class Light
 
         return $response;
     }
+
+    /**
+     * claim case
+     *
+     * @param $userUid
+     * @param $Fields
+     * @param $type
+     * @throws \Exception
+     */
+    public function claimCaseUser($userUid, $sAppUid)
+    {
+        $response = array("status" => "fail");
+        $oCase = new \Cases();
+        $iDelIndex = $oCase->getCurrentDelegation( $sAppUid, $userUid );
+
+        $oAppDelegation = new \AppDelegation();
+        $aDelegation = $oAppDelegation->load( $sAppUid, $iDelIndex );
+
+        //if there are no user in the delegation row, this case is still in selfservice
+        if ($aDelegation['USR_UID'] == "") {
+            $oCase->setCatchUser( $sAppUid,$iDelIndex, $userUid );
+            $response = array("status" => "ok");
+        } else {
+            //G::SendMessageText( G::LoadTranslation( 'ID_CASE_ALREADY_DERIVATED' ), 'error' );
+        }
+        return $response;
+    }
 }
diff --git a/workflow/engine/src/ProcessMaker/Services/Api/Light.php b/workflow/engine/src/ProcessMaker/Services/Api/Light.php
index 1e3f7687d..c3421e0c6 100644
--- a/workflow/engine/src/ProcessMaker/Services/Api/Light.php
+++ b/workflow/engine/src/ProcessMaker/Services/Api/Light.php
@@ -794,10 +794,28 @@ class Light extends Api
         try {
             $userUid = $this->getUserId();
             $oMobile = new \ProcessMaker\BusinessModel\Light();
-            $filesUids = $oMobile->documentUploadFiles($userUid, $app_uid, $app_doc_uid, $request_data);
+            $response = $oMobile->documentUploadFiles($userUid, $app_uid, $app_doc_uid, $request_data);
         } catch (\Exception $e) {
             throw (new RestException(Api::STAT_APP_EXCEPTION, $e->getMessage()));
         }
-        return $filesUids;
+        return $response;
+    }
+
+    /**
+     * @url POST /case/:app_uid/claim
+     *
+     * @param $app_uid
+     * @return mixed
+     */
+    public function claimCaseUser($app_uid)
+    {
+        try {
+            $userUid = $this->getUserId();
+            $oMobile = new \ProcessMaker\BusinessModel\Light();
+            $response = $oMobile->claimCaseUser($userUid, $app_uid);
+        } catch (\Exception $e) {
+            throw (new RestException(Api::STAT_APP_EXCEPTION, $e->getMessage()));
+        }
+        return $response;
     }
 }