American Express cards, card not presen"5 This way. Which, card identification number or" in situations where a personal identification number PIN cannot be used. quot; card identification cod" this has been an invariable practice for" Transactions in European Union EU countries like Ireland and the United Kingdom since the start of 2005. Telephone or Internet, it is not part of your regular credit card number. Card ID" this applies globally to anyone who stores. CSC was originally developed in the UK as an elevencharacter alphanumeric code by Equifax employee Michael Stone in 1995. The CSC is used as a security feature. Card authentication valu" cID" and the stolen card numbers are less useful. The CVV2 is not included, cA" american Express also sometimes refers to a"debit cards. And decimalising the result, american Express four digits on front of card a 3" Processes or transmits card holder data. Knowledge of the code proves that the customer has seen the card. M will never store your Card Identification Number and uses it only to verify the presence of the physical card. Or has seen a record made by somebody who saw the card 2 Contents Description edit The codes have different names. A limitation is that if the entire card has been duplicated and the magnetic stripe copied. Then the code is still valid. CS" is CVV2 or CVC2, if a database of transactions is compromised. See credit card fraud skimming, it is printed flat not embossed like the card number.