Hi all, I have implement In-App Purchase in my application. I am using the build-in product model to deliver the product. So, is it compulsory or necessary for an application to perform the step of verifying that the receipt I received from Store Kit came from Apple? If it is necessary to verify the store receipt, am I need to do this through an external server? Can it be done through the IOS devices? Any comments and suggestions are welcome. Thanks a lot.