First of all, request a copy of the ID and credit card from your customer in order to verify that the name on the card matches the name on the ID. If you question the legitimacy of the payment, do not ship the items and freeze the order. After the transaction is proven to be fraudulent, immediately refund the charge to the cardholder; otherwise, the legitimate cardholder may demand a Mokesčių grąžinimas. Make sure the 3D Secure feature is activated and works properly in order to prevent further fraudulent activity.