717bffa5_se_Notes___Amazon_Web_Services__Issue
[Description] If your product has a sign-up/monthly fee, and the customer's sign-up payment fails because the payment method isn't valid, the customer is not officially subscribed to your product. This can be verified with VerifyProductSubscriptionByTokens (for desktop products) or VerifyProductSubscriptionByPid (for hosted products), which returns a value of "false". The customer can't use the product, even if you've activated the customer. We recommend your product poll the customer's subscription status after activating the customer. If the status is still "false" 15 minutes after activation, then the product should display a special message when the customer tries to use the product the first time. The message should tell the customer to: Cancel the subscription by going to the Application Billing page (at http://www.amazon.com/dp-applications). Update the payment method (also at the Application Billing page). Resubscribe to the product with the valid payment method (by clicking the purchase URL). [Issue] 
Failure of Sign-Up Payment
Release: Amazon DevPay on 2010-03-25 : Release Notes : Amazon Web Services
Issue