When a buyer adds your product to their shopping cart and checks out, Amazon processes their order following these steps:
Pending orders will not appear in either the Orders report or the Unshipped Orders report and will be grayed out (non-actionable) in Manage Orders. Amazon holds all orders for 30 minutes, which gives buyers an opportunity to cancel orders. Buyer-canceled orders will appear in Manage Orders as canceled, and will be grayed out. In some cases, our payment and order detail verification processes may potentially extend order processing times for as long as 21 days. For more information, see Pending Orders. If a buyer contacts you while an order is in Pending status, refer them to Amazon Customer Service for more information.
Payment verification is successful. See step 3.
Payment verification is initially unsuccessful or extended. In some cases, our payment and order detail verification processes may extend order processing times, potentially for as long as 21 days. Pending orders should not be shipped, even if the buyer contacts you directly. Pending orders will not appear in either the Orders report or the Unshipped Orders report and will be "grayed out" (non-actionable) in Manage Orders.
An order gets canceled if payment authorization does not succeed or in cases of fraud. Amazon will not notify you when an order is canceled, other than recording the order as canceled in Manage Orders. No further action is necessary.
If a buyer contacts you about a canceled order and you still have available inventory, you can invite them to place a new order on Amazon.