Amazon DevPay
Developer Guide (API Version 2007-12-01)

When Customers Don't Pay

What happens if a customer doesn't pay? If we're unable to charge your customer's credit card, we e-mail the customer and ask for a valid payment method. We retry the payment up to three times, once each week. If the customer still hasn't paid after the third retry (21 days after the initial billing attempt), we cancel the customer's access to your product. Your customer can no longer access any data stored with AWS using your product.

The amount you pay to AWS decreases if a customer doesn't pay a bill. For more information, see If a Customer Doesn't Pay the Monthly Bill.

DevPay doesn't notify you by e-mail if a customer cancels or doesn't pay. For information about determining when customers cancel or don't pay, see Reports and Verifying the Customer's Subscription Status.