That 3-digit number is your Card Security Code. If your CSC number has been scratched off or is not visible you will need to contact your credit card company or bank for additional information. How to ...

ACS allows you to pay for purchases online by using your MasterCard, Visa, Diners Club, and American Express credit cards. Because some customers have concerns about providing their credit card ...

As you look for strategies to increase the number ... president at Visa. Both the expiration date and the CVV, or security code, serve as additional security features on your card.