iOS in app-purchase receipt validation - sandbox vs production url?

Question

I followed Ray Wenderlich\'s tutorial to implement receipt validation in my app. The code connects to Apple\'s validation server directly from my app rather than going thro

Answer 1

Always verify your receipt first with the production URL; proceed to verify with the sandbox URL if you receive a 21007 status code. Following this approach ensures that you do not have to switch between URLs while your application is being tested or reviewed in the sandbox or is live in the App Store.

Note: The 21007 status code indicates that this receipt is a sandbox receipt, but it was sent to the production service for verification.

There is no public API to call to distinguish the production and sandbox environments so that you can decide which server to use ahead of time. If you have implemented the recommended receipt validation process, the fix can be implemented at your server which contacts the StoreKit server. If the status code for the validation attempt is 21007, then try again at the sandbox server.