Paying for app after user deletes it

If a user has already In-App paid for my app and then deletes it before the subscription runs out and downloads it again, and since my app doesn't keep subscription data in the keychain (which remembers only when the app was downloaded), my app starts the subscribing process. When Apple sees the subscription request, will Apple tell the user that it's already been paid for? I don't see this behavior in the sandbox.