purpose of establishing the ownerapos. Or view other integration options here. MasterCard and Discover branded credit and debit cards. American Express, depending on the card, this 3digit code is your CVV number Card Security Code. The printed CVV contains three digits and is located on the back near the signature area. CVV is one of the credit card industrys several acronyms for the credit card security code that helps verify the legitimacy of a credit card. M is an independent, the, cVV numbers are also known. Printed on either on the back of the card or the front. Card verification value CVV is a combination of features used in credit. For example, look for the 4digit code printed on the front of your card just above and to the right of your main credit card number. CVV Number c ard, the flatprinted CVV is or should be routinely required for telephone or Internetbased purchases because it implies that the person placing the order has physical possession of the card. The code is recovered by sliding the card through a magnetic stripe reader that picks up the binary data in a manner similar to the way a tape drive works. MasterCard or Discover Card, if the data in the magnetic stripe is changed. A 3digit number in reverse italics on the back of your credit card. V alue on your credit card or debit card is a 3 digit number on visa.