If a buyer has placed an order, but you are unable to fulfill an order (out of stock/shipping limitations), you can file a Seller Cancelation Request. Visit the “Orders” tab in your Seller Dashboard and locate the unfulfillable order. Expand the row and click “Cancel Order”:
Select a reason and click “Cancel This Order”:
All Cancelation requests are forwarded to the buyer for confirmation before your account is credited.
If there's an error in your account summary or account balance, file a seller charge dispute instead.