DSW accept: Mastercard, Visa and your credit card will only be charged when they have shipped. Card verification code: In order to make transactions on the Internet more secure, this number is not stored in the magnetic strip, nor is it printed on the payment receipt. By requesting this card verification code, you can ensure that the customer has their credit card in front of them, and Visa and EuroCard/Mastercard, the card verification code is a three-digit number printed on the upper right corner of the signature strip, next to the credit card number that may be repeated.