diff --git a/mobileapi/components/ActivatedFilter.php b/mobileapi/components/ActivatedFilter.php
index 8e085d7..5945f2c 100644
--- a/mobileapi/components/ActivatedFilter.php
+++ b/mobileapi/components/ActivatedFilter.php
@@ -40,11 +40,13 @@ class ActivatedFilter extends ActionFilter
                 // find out if the device is activated
                 $activated = $mobileDevice->status === MobileDevice::STATUS_ACTIVE;
                 // override activated to true, if it is a reviewer card
-                $card = Card::findOne($idCard);
-                if ( isset($card) ){
-                     if ( isset($card->type) ){
-                         $activated = true;
-                     }
+                if (isset($idCard)) {
+                    $card = Card::findOne($idCard);
+                    if (isset($card)) {
+                        if (isset($card->type)) {
+                            $activated = true;
+                        }
+                    }
                 }
             }
             // if device is not activated, throw exception with http status 412