I'm trying to handle the refund in-app purchase for iOS. But I couldn't find a clear guidelines to do this.
So I have a membership type in-app purchase feature, where the user credentials is not necessarily ties to the itunes account.
Is there some kind of identifier that I can refer to when someone make a purchase, and have the same identifier when they request a refund through apple?
Also, do we get instant notification when they refund it? I need to cancel the membership immediately.
Thanks!