I'm trying to test the in App purchase within the sandbox environment.

In order to test the code I

a) created a In App Purchase Test User account under 'Manage Users' in iTunes Connect

b) created some in app purchase products under 'Manage Your In App Purchases'. I used numeric values and alpha-numeric values for the Product ID's.

c) Loaded the app onto the iPhone, went to Settings->Store and logged out of the regular store and into the under a) created test account

d) set a breakpoint in the (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response callback

All the submitted Product ID's are in the response.invalidProductIdentifiers category. When submitting the request I use either the Product ID's used under b) directly or I tried to prefix them with the Bundle ID:

NSString *id2 = @"com.super.duper.8";

NSSet *productList = [NSSet setWithObjects:id2, @"8", nil];

SKProductsRequest *request= [[SKProductsRequest alloc] initWithProductIdentifiers:productList];

Am I missing something obvious? Any help is appreciated.

Achim