Those are certificates for testing your receipt signature validation. What is a signature? It provides by apple with your receipt and you can verify it either it is from apple or any bad action happen. How to validate a receipt then? several ways. server site validation. in mobile(local) validation or validation with the app store. Below are some documents for different validations. apple doc for receipt validation locally - https://developer.apple.com/library/archive/releasenotes/General/ValidateAppStoreReceipt/Chapters/ValidateLocally.html#//apple_ref/doc/uid/TP40010573-CH1-SW18 Validating Receipts with the App Store - https://developer.apple.com/documentation/storekit/in-app_purchase/validating_receipts_with_the_app_store Related video - https://developer.apple.com/videos/play/wwdc2020/10659/