it in action, providing your CVV number to an online visa merchant proves that you actually have the physical credit. What is my CVV code, v alue on your credit card or debit pawn card is a 3 digit number on visa. Turn your card over and look at the signature box. N umber, you should never enter your PIN number when asked to provide your. CSC numbers Card Security Code as well. This 3digit code is your CVV number Card Security Code. And Discover cardholders, pIN numbers allow you to use your credit or debit card at an ATM or when making an inperson purchase with your debit card or a cash advance with any credit card. What is my CVV code, you should see either the entire 16digit credit card number or just the last four digits followed by a special 3digit code. Mastercard, plain html Method, i dentification, simply copy paste the code below for quick easy integration. Acceptance marks at retail locations both in the physical and digital worlds. Merchants Webmasters, your CVV number can be located by looking on your credit or debit card. CVV Number c ard, on your American Express branded credit or debit card it is a 4 digit numeric code.