​Our submission team might encounter issues during the app build process that require certificates to be revoked. In such cases, you will receive a notification email from Apple. 

The following email notification is sent if your iOS Distribution certificate was revoked:

The following email notification is sent if your Apple Push Notification Service (APNs) certificate was revoked:

If our submission team revokes one of your certificates, they will create a new certificate in it's place and this will not affect your existing app.