iOS push notifications behavior when app is deleted and then reinstalled

Question

I\'ve encountered an unusual scenario where a user is continuing to receive notifications when my app has been deleted and then reinstalled. The scenario is as follows:

Answer 1

When you delete the app, the OS doesn't "de-register" it from APNS. You have to send a notification to a device that has deleted the app in order to "de-register" it. This may take a few tries from APNS until it figures out the app has been deleted.