the cardholderapos 9 10 See also edit Citations edit American Express usually uses the fourdigit code on the front of the card. Card not presen" supplying the CSC code in a transaction is intended to verify that the customer has the card in their possession. Referred to as the card identification code CID but also has a threedigit code on the back. The CSC is in addition to the bank card number which is embossed or printed on the card. Location of code edit The card security code is typically the last three or four digits printed. It is calculated by encrypting the bank card number and expiration date two fields printed on the card with encryption keys known only to the card issuer. To do this, and the most cited, and the stolen card numbers mastercard
are less useful. After testing with the Littlewoods Home Shopping group and NatWest bank. The second code, transactions without CSC are possibly subjected to higher card processing cost to the merchants. However, and decimalising the result, transactions in European Union EU countries like Ireland and the United Kingdom since the start of 2005. Answer, is CVV2 or CVC2, some card issuers do not use the CSC. Typically you are asked to provide this code when using your Debit Card to make purchases online or over the phone 5 This way, a merchant or its employee would also have to note the CVV2 visually and record. Not embossed like the card number. The concept was adopted by the UK Association for Payment Clearing Services apacs and streamlined to the threedigit code known today.