When you make credit card purchases online or over the phone, you'll often need the card's security code to complete the transaction. The security code helps to protect you from credit card fraud and ...

Your credit cards consist of a three digit security number which is known as a CVV (Card Verification Value). Often overlooked, the CVV plays a significant role in ensuring the security of your ...

It's how Amazon can continue using your card without checking for the CVV on a regular basis. It's also how some companies that perform regular charges are allowed to continue using a card for a while ...