AVS (Address Verification Service)
explained.

How AVS works

1. At checkout, you collect the billing street address and postal code.
2. Your processor sends them with the authorization request.
3. The issuer compares them with its records and returns a result for the street line and the postal code.
4. You or your fraud rules decide what to do with the result. A failed AVS check does not by itself decline a payment unless you or your processor set a rule to block it.

Stripe notes that support for AVS varies by country and issuer: some countries don't use postal codes, some issuers don't verify street addresses, and most cards issued in the United States, Canada and the United Kingdom support street address verification.

Reading AVS results

• Full match (street and postal code): good sign, not proof of identity. A fraudster with the full stolen card record often has the billing address too.
• Postal code match only: common, often legitimate (apartment numbers and abbreviations trip up street matching).
• No match: a meaningful risk signal, especially combined with other signals such as a new account, rush shipping or an IP far from the address.
• Unavailable / not checked: the issuer couldn't or didn't verify. Treat as neutral, not as a pass.

Where AVS helps in disputes

American Express lists, among acceptable responses to an F29 card-not-present fraud chargeback, proof that you validated the address through authorization and shipped to that validated address, and a "Y" address verification response appears among the supporting items for digital goods. For Visa 10.4 fraud disputes, AVS results are supporting evidence alongside CVV, 3-D Secure and customer history.

A worked example

Two $310 orders arrive within minutes. Order A: AVS full match, CVV match, shipping to the billing address, returning customer. Order B: AVS no match, CVV match, shipping to a freight forwarder, new account, IP in another country. Neither result alone decides it, but together they make Order B worth holding for review while Order A ships.

Common mistakes

• Auto-declining every mismatch. Stripe notes legitimate customers fail AVS when they mistype or move without telling their bank.
• Treating a match as proof. AVS shows the address matches the issuer's records, not who typed it.
• Shipping to a different address and relying on AVS in a fraud dispute. The strongest evidence is a match plus delivery to that verified billing address.
• Not storing the result with the order, so it is missing when a dispute arrives weeks later.

How Verdikx helps

Verdikx is a fraud, chargeback and dispute platform for e-commerce and SaaS merchants, made by Verdikx LLC. When a connected processor reports AVS and CVV results (Stripe does), Verdikx adds them to the payment record in the dispute packet, and the evidence checklist flags them as "Payment authorization (AVS / CVV / 3-D Secure)". Drafts state the result ("the AVS and CVV checks matched") without claiming it proves the cardholder authorized the payment. On Growth and Pro, order screening weighs address mismatches with other signals, such as IP location, velocity and customer history, rather than blocking on AVS alone. See Shopify fraud detection.