diff --git a/src/BusProNet/Model/Notification.php b/src/BusProNet/Model/Notification.php
index ee84cf7..e54078c 100644
--- a/src/BusProNet/Model/Notification.php
+++ b/src/BusProNet/Model/Notification.php
@@ -20,12 +20,6 @@ class Notification
             return true;
         }
 
-        // These weird and contradictory looking assertions are required because
-        // of the stupid API implementation that doesn't distinguish between error
-        // and success responses.
-        $responseIsError = 100 <= $this->code || $this->message === 'Daten konnten nicht gesendet werden.';
-        $responseIsSuccess = 650 === $this->code && false === stripos($this->message, 'fehler');
-
-        return false === $responseIsError && true === $responseIsSuccess;
+        return 650 === $this->code && false === stripos($this->message, 'fehler');
     }
-}
\ No newline at end of file
+}