Apple iOS IAP Receipt Verification FAQ
What url should I use to verify my receipt (iOS)?
Use the sandbox URL https://sandbox.itunes.apple.com/verifyReceipt while testing your application in the sandbox and while your application is in review.Use the production URL https://buy.itunes.apple.com/verifyReceipt once your application is live in the App Store.
How do I verify my receipt (iOS)?
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.