Whenever Amazon fails to collect a payment, we notify both the merchant and the subscriber of the problem.
For payment method failures, Amazon sends an email message to the subscriber advising them to update the payment method. The merchant is sent an IPN response of PendingSubscriberAction.
For failures due to other reasons, Amazon sends an email message to the subscriber about the irregularity. If Amazon plans to retry the collection, the merchant is sent a PaymentRescheduled code in the IPN response.
If Amazon decides to stop trying to collect the payment, but is not canceling the subscription, Amazon sends an email message to the subscriber about the irregularity. The merchant is sent a PaymentCancelled code in the IPN response.
If for any reason Amazon has decided to cancel the subscription, Amazon sends an email message to both the subscriber and the merchant about the cancellation. The merchant is sent a SubscriptionCancelled code in the IPN response.
