- AVS (Address Verification Service): determines if the address provided by the customer matches the address of the credit card
- CVV (Code Verification Value): the three or four digit number on the back of a credit card
–providing
these numbers ensures that the card is in the hand of its owner
This
is also known as CSC (Card Security Code), CVC (Card Verification
Code), and V-Code,depending on the card scheme norms and region
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