The CVV/CVV2 code is a three or four digit value that helps to ensure that the customer has a legitimate credit card in his/her possession. The code is located immediately following the credit card account number.
Visa, MasterCard, Discover:
![Example of CVV code location on Discover, Visa, and MasterCard](/assets/media/cvv_example.png)
American Express:
![Example of CVV code location on American Express](/assets/media/cvv_example_amex.png)