What is the CVV2 Number?
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An important new security feature for online and other "card-not-present" transactions now appears on recently issued Visa, Mastercard, Discover, and American Express credit cards. This new feature, called CVV2, is a three-or four-digit value which provides a cryptographic check of the information embossed on the card. Note: CVV2 is now used at most major e-commerce websites, including Amazon.com. It protects the credit card holder from fraud.
Where can I find the number?
The CVV2 three-digit value is printed on the signature panel on the back of your credit card immediately following the card account number.