Security Checkpoints: AVS and CSC

Attention, merchants!

Frontline Processing highly recommends you obtain AVS and CSC numbers on every non-face-to-face sale possible. Non-face-to-face sales are transactions made via mail-order, over the telephone or online. This activity is also referred to as ‘card not present’ transactions (CNP), and a transaction without the physical card is a common avenue to fraud.

Because of the level of risk involved in CNP, non-face-to-face debit and credit card transactions, merchants should always use AVS and CSC to ensure secure transactions with legitimate consumers. According to MasterCard,”…airlines, Internet and catalog merchants, and telemarketers conduct $200 billion in business through ‘card-not-present’ transactions with customers they never see.”

The CSC (Card Security Code) is the 3-digit number on the back of VISA®, MasterCard® and Discover® card and the 4-digit number listed above the card number on American Express® cards. CSC numbers are used during CNP transactions. The CSC can only be seen on the physical card, so hackers who possess the cardholder’s name, card number and expiration date cannot follow through with deceptive purchases.

The AVS (Address Verification System) is the method used to authenticate the cardholder’s address. The billing address on file with the card issuer is checked with the address provided by the cardholder to ensure that the card was not stolen.

Bottom line: The more numbers a merchant requires to complete a transaction, the less likely a cardholder is to be the victim of fraud. In order to boost protection against sales on lost or stolen cards and stolen card data, layer your security with the AVS and CSC checkpoints!


With the release of more secure EMV chip cards, which decrease counterfeit card scams as well as lost or stolen card fraud, it is predicted that criminals will target CNP transactions.

Call our customer support at 1-866-651-3068 to learn more about our Credit Card Processing services!

At Frontline Processing, on average, we save our merchants 12% or more on their credit card processing fees! 


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