TN2413: provides answers to frequently asked questions about in-app purchase.

[MC-HaoPhan]

We found that your in-app purchase products exhibited one or more bugs which create a poor user experience. Specifically, the free trial does not reflect after purchase.
Review device details:

• Device type: iPhone and iPad
• OS version: iOS 16.0.3
  Next Steps
  When validating receipts on your server, your server needs to be able to handle a production-signed app getting its receipts from Apple’s test environment. The recommended approach is for your production server to always validate receipts against the production App Store first. If validation fails with the error code “Sandbox receipt used in production,” you should validate against the test environment instead.
  Resources
• Learn how to set up and test in-app purchase products in the sandbox environment.
• For more information on receipt validation, see the In-App Purchase FAQ.
• If your app makes a SKReceiptRefreshRequest call and fails, do not retry the call. Assume the user does not have access. Continue by making the addPayment call.
• If your app makes a SKReceiptRefreshRequest call to restore previously purchased in-app purchases, make sure the app calls restoreCompletedTransactions when the user selects the “Restore” button.
  Please see attached screenshot for details.

My app is rejected and the app store gives me this error. Please show me how to fix the error.