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  2. Card security code - Wikipedia

    en.wikipedia.org/wiki/Card_security_code

    A card security code ( CSC; also known as CVC, CVV, or several other names) is a series of numbers that, in addition to the bank card number, is printed (but not embossed) on a credit or debit card. The CSC is used as a security feature for card not present transactions, where a personal identification number (PIN) cannot be manually entered by ...

  3. Credit card information: The basics you need to know - AOL

    www.aol.com/finance/credit-card-information...

    A Card Verification Value (CVV), also called a security code, is the three-digit number located on the back of your credit card near the signature box, typically under the magnetic strip. If you ...

  4. What Is a Credit Card Security Code and Why Is It Important?

    www.aol.com/credit-card-security-code-why...

    The three- or four-digit code on credit and debit cards can be either a card security code or a card verification value. A three-digit CVV is located on the back of Mastercard®, VISA® and ...

  5. Luhn algorithm - Wikipedia

    en.wikipedia.org/wiki/Luhn_algorithm

    Luhn algorithm. The Luhn algorithm or Luhn formula, also known as the " modulus 10" or "mod 10" algorithm, named after its creator, IBM scientist Hans Peter Luhn, is a simple check digit formula used to validate a variety of identification numbers. It is described in US patent 2950048A, granted on 23 August 1960. [1]

  6. Identity documents in the United States - Wikipedia

    en.wikipedia.org/wiki/Identity_documents_in_the...

    In the United States, identity documents are typically the regional state -issued driver's license or identity card, while also the Social Security card (or just the Social Security number) and the United States passport card may serve as national identification. The United States passport itself also may serve as identification.

  7. Want to Decode Your Credit Card Number? Check Out This ... - AOL

    www.aol.com/news/2011-02-11-want-to-decode-your...

    In this infographic, our friends at Mint.com decode your credit card number and show you one way to determine if a card is

  8. Add, edit, or delete a payment method for AOL services

    help.aol.com/articles/update-your-payment-method

    If your card number has changed, you must add a new card. 1. Sign in to your My Account page. 2. Click My Wallet. 3. Click Payment Methods. 4. Click Add Credit or Debit Card. 5. Enter the new info. 6. Click Submit.

  9. Address verification service - Wikipedia

    en.wikipedia.org/wiki/Address_verification_service

    An address verification service ( AVS) is a service provided by major credit card processors to enable merchants to authenticate ownership of a credit or debit card used by a customer. [ 1] AVS is done as part of the merchant's request for authorization in a non-face-to-face credit card transaction. The credit card company or issuing bank ...