Tadeas Kriz Are you doing a "fake" registration or is it actually a registration with a real device , asking that because of this comment https://github.com/aerogear/aerogear-unifiedpush-server/blob/3c88fe34ba9874249fb2702e27f654c67df7f6d6/push/sender/src/main/java/org/jboss/aerogear/unifiedpush/message/sender/APNsPushNotificationSender.java#L154-L156