Address verification service: Difference between revisions

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Fixed incorrect Discover and Amex values for response code "A" (according to the cited sources. And adding another citation.
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==AVS support==
AVS is a service to combat fraudulent activity for non-face-to-face transactions by cross-referencing the address provided by a cardholder to a merchant with the card issuer's records. AVS is offered by [[Visa Inc.|Visa]], [[MasterCard]], [[Discover Card|Discover]] and [[American Express]] in the United States, Canada and the United Kingdom. It is also offered by [[Discover Card|Discover]].
 
Cardholders with a bank that does not support AVS may receive an error from online stores due to the lack of verification.