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  2. 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.

  3. 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.

  4. Third-party verification - Wikipedia

    en.wikipedia.org/wiki/Third-party_verification

    Third-party verification adds an important element of proof to electronic transactions. For example, in a just-completed experimental study of consumer reactions to electronic contracts, over 80% of respondents agreed that a transaction was harder to dispute because the verification was made and held by an independent third party.

  5. Card security code - Wikipedia

    en.wikipedia.org/wiki/Card_security_code

    There are several types of security codes and PVV (all generated from DES key in the bank in HSM modules using PAN, expiration date and service code): . The first code, 3 numbers, called CVC1 or CVV1, is encoded on track one and two of the magnetic stripe of the card and used for card present transactions, with signature (second track also contains pin verification value, PVV, but now it is ...

  6. Telephone number verification - Wikipedia

    en.wikipedia.org/wiki/Telephone_number_verification

    A unique code is first indicated or displayed to the customer via the web site, then an automated call is then placed to the supplied subscriber telephone number. To validate the transaction, the code entered via the telephone keypad must match. This method is used by Google Voice and online banking services such as Lloyds TSB.

  7. What Is a Billing Zip Code? How To Find Yours for Your Credit ...

    www.aol.com/billing-zip-code-yours-credit...

    Your billing zip code, or credit card postal code, is the five-digit number on the bottom right, which in this sample is 90210. This would be the zip code associated with your billing address.