diff --git a/workflow/engine/src/ProcessMaker/BusinessModel/Task.php b/workflow/engine/src/ProcessMaker/BusinessModel/Task.php
index 0bf128b11..1bd506ad4 100644
--- a/workflow/engine/src/ProcessMaker/BusinessModel/Task.php
+++ b/workflow/engine/src/ProcessMaker/BusinessModel/Task.php
@@ -1927,5 +1927,23 @@ class Task
             throw $e;
         }
     }
+    
+    public function getValidateSelfService($data)
+    {
+        $data = array_change_key_case($data, CASE_LOWER);
+        $sTaskUID = $data['act_uid'];
+        $response = new stdclass();
+        $oCriteria = new Criteria();
+        $oCriteria->add(AppDelegationPeer::DEL_THREAD_STATUS, "OPEN");
+        $oCriteria->add(AppDelegationPeer::TAS_UID, $sTaskUID);
+        $oCriteria->add(AppDelegationPeer::USR_UID, "");
+        $oApplication = AppDelegationPeer::doSelectOne($oCriteria);
+        if(!empty($oApplication)) {
+            $response->result = false;
+            $response->message = G::LoadTranslation('ID_CURRENT_ASSING_TYPE_WITH_CASES');
+        }
+        $response->result = true;
+        return $response;
+    }
 }
 
diff --git a/workflow/engine/src/ProcessMaker/Services/Api/Project/Activity.php b/workflow/engine/src/ProcessMaker/Services/Api/Project/Activity.php
index 9a04e2232..136db2822 100644
--- a/workflow/engine/src/ProcessMaker/Services/Api/Project/Activity.php
+++ b/workflow/engine/src/ProcessMaker/Services/Api/Project/Activity.php
@@ -202,6 +202,26 @@ class Activity extends Api
             throw (new RestException(Api::STAT_APP_EXCEPTION, $e->getMessage()));
         }
     }
+    
+    /**
+     * @url PUT /:prj_uid/activity/validate-active-cases
+     *
+     * @param string $prj_uid {@min 32}{@max 32}
+     */
+    public function doGetActivityValidateSelfService($prj_uid, $request_data =  array())
+    {
+        try {
+            $task = new \ProcessMaker\BusinessModel\Task();
+            $task->setFormatFieldNameInUppercase(false);
+            $task->setArrayParamException(array("taskUid" => "act_uid"));
+
+            $response = $task->getValidateSelfService($request_data);
+
+            return $response;
+        } catch (\Exception $e) {
+            throw (new RestException(Api::STAT_APP_EXCEPTION, $e->getMessage()));
+        }
+    }
 }