What Is AVS For Credit Card Processing?

Credit card processors may charge an Address Verification Service (AVS) fee when a transaction includes a billing address check.

In this guide, we’ll explain how AVS works, when it’s used, and what it may cost your business.

What Is AVS?

Address Verification Service (AVS) is a fraud-screening tool that compares the billing address or ZIP code provided by a customer with the information held by the card issuer.

The issuer returns a result showing whether the information fully matches, partially matches, does not match, or could not be verified. AVS can help identify suspicious transactions, but a match does not prove that the customer is the legitimate cardholder.

Businesses that accept online, telephone, mail-order, or manually entered payments are more likely to use AVS. However, whether a separate fee applies depends on the processor’s pricing structure.

AVS is supported by major card networks and is used primarily in the United States, Canada, and the United Kingdom.

When Is AVS Used?

AVS is most commonly used for card-not-present transactions, including online, telephone, and mail-order payments. It may also be used when card information is entered manually at a physical business.

The customer submits a billing address with the card details. The processor sends that information to the card issuer, which returns an AVS response code.

What Is An AVS Fee?

An AVS fee is a per-transaction charge that may apply when an address check is performed.

Whether you see a separate AVS fee depends on your processor and pricing plan. Some processors list it as an individual charge, while others include it in their standard processing rate.

Because fees vary, check your processing statement and merchant agreement rather than assuming AVS is included.

AVS Fees By Pricing Model

How AVS fees are charged depends on your processor and pricing plan.

What Does An AVS Mismatch Mean?

An AVS mismatch means that some or all of the billing information submitted with a transaction did not match the information held by the card issuer. It does not automatically mean the card is stolen; the customer may have entered the address incorrectly, recently moved, or used a card for which AVS is unavailable.

AVS responses generally fall into four categories: a full match, partial match, no match, or unavailable result.

Your processor or gateway may approve, decline, or flag the transaction based on the result.

How To Respond To An AVS Mismatch

When a transaction returns an AVS mismatch:

• Ask the customer to confirm the billing address associated with the card.
• Consider other fraud signals, such as the CVV result, order value, IP location, device information, and transaction history.
• Decline or manually review the payment if multiple details appear suspicious.

Avoid automatically treating every partial mismatch as fraud. Rules that are too strict can block legitimate customers, while overly permissive settings can increase fraud risk.

Also remember that AVS checks the billing address, not the shipping address. A different shipping address can be legitimate, but unusually large orders or last-minute shipping changes may warrant additional review.

Use AVS With Other Fraud-Prevention Tools

AVS can help identify suspicious card-not-present transactions, but it should not be used on its own.

A layered fraud-prevention approach may include:

• CVV verification
• IP and geolocation checks
• Device fingerprinting
• Transaction limits and velocity checks
• Manual review of unusually large or modified orders
• Fraud-scoring tools provided by your gateway or processor

The Bottom Line On AVS

AVS helps businesses identify suspicious online, telephone, and manually entered card payments, but it can’t confirm a customer’s identity or prevent every fraudulent transaction.

Your processor may include AVS in its standard rate or charge a separate fee. Check your merchant agreement and processing statements to see how it is billed.