If a buyer asks you to cancel an order and you have not yet shipped the order*, you can cancel it in Manage Orders or use an Order Cancelation feed.
When you cancel an order, Amazon automatically updates the order status in the buyer's Amazon account and sends an email notification to the buyer. Canceling an order that the buyer requests does not have an impact on your Cancelation Rate metric, nor will you be charged a cancelation fee (canceling an order for any other reason, not requested by the buyer, may incur a cancelation fee).
Both cancelations and returns are a normal part of most sales operations.
When you ship your package, we send the buyer an email notification with the delivery information. Do not contact the buyer with your own shipment verification.
After the order has shipped, your earnings are credited to your seller account to be disbursed to your bank account with your next settlement.
Amazon invites the buyer to provide feedback about the service provided by the seller. The buyer is also eligible to return the item, as per the relevant policies.