Amazon Chargebacks
If you are seller at Amazon, and a buyer initiates a chargeback against you, you must try to make that seller happy, because Amazon will usually side with the buyer on chargebacks.
However, if the basis of the chargeback is an unauthorized transaction (fraud), Amazon will cover you. Amazon screens all purchases for fraud and takes responsibility for the validity of the payment.
This fraud seller protection policy does not, however, cover situations where the buyer does not dispute the transaction but has an issue with the quality of the product.