I would be very very interesting in the answer for this. Its a struggle to fully understand what download_id means.

Here's the scenario– App downloaded via TestFlight appStoreReceiptURL is retrieved Checks if there is a receipt at that URL ------> If NOT found–> a new request is via the following, and that's when the authentication dialog pops up, it is successful when sandbox account credentials are entered. Otherwise it fails let request = SKReceiptRefreshRequest(receiptProperties: nil) request.delegate = self request.start() My Question is (and I have no way to know this for sure), when app is in production, and downloaded from the App Store (Not TestFlight), would that also have the same authentication dialog pop? At this point I was assuming this authentication event is due to TestFligth and Sandbox Apple Account. FB#