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The Address Verification System (AVS) is a system used to verify the address of a person claiming to own a credit card. The system will check the billing address of the credit card provided by the user with the address on file at the credit card company. The other security features for the credit card include the CVV2 number. AVS is used when the merchant verifies credit card data, such as billing address and ZIP code, against the Visa/MasterCard billing information of the cardholder.〔(【引用サイトリンク】url=http://virtualtrak.blogspot.com/2007/03/address-verification-system-avs.html )〕 AVS verifies that the billing address of the credit or debit card matches the address that was given by the customer. Because AVS only verifies the numeric portion of the address, certain anomalies like apartment numbers can cause false declines; however, it is reported to be a rare occurrence. AVS verifies the numeric portions of a cardholder's billing address. For example, if the address is 101 Main Street, Highland, CA 92346, in the United States, AVS will check ''101'' and ''92346''. Cardholders may receive false negatives, or partial declines for AVS from e-commerce verification systems, which may require manual overrides, voice authorization, or reprogramming of the AVS entries by the card issuing bank. ==AVS support== AVS is a MasterCard service to combat fraudulent activity for non-face-to-face transactions by cross-referencing the cardholder’s address information with the card issuer’s records.〔(【引用サイトリンク】url=http://www.elect-mer.com/glossary-a.html )〕 AVS is widely supported by Visa, MasterCard and American Express in the USA, Canada and United Kingdom. Cardholders with a bank that does not support AVS may receive an error from Internet stores due to the lack of data. Besides the automated verification, some banks do provide merchants with a manual verification system. Usually this is done for foreign credit card accounts as the AVS only works in the same country. This facility helps the merchants to prevent fraud arising from other countries. The merchant's bank calls the customer banks (or send a fax for banks that request them). Some countries like Denmark however prevent banks from verifying customer data. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Address Verification System」の詳細全文を読む スポンサード リンク
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