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Card Verification Fraud Test: What It Is and How It Is Caught

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Card Verification Fraud Test: What It Is and How It Is Caught

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Card Verification Fraud Test: What It Is and How It Is Caught

Answer

A card verification fraud test is a small authorization or charge run against a payment card to find out if the card is active. The person running the test holds the card number, expiration date, and CVV, and does not hold the physical card. The test answers one question: will the issuer approve a charge?

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Why testers do it

Stolen card records move in bulk. A buyer gets a file of numbers with no proof that any of them still work. Issuers close accounts after a fraud report, so a share of any bulk file is dead. A test charge costs a few cents to a few dollars. If the charge posts, the card is live. If it declines, the record is dropped. Cardholders often miss charges under five dollars on a statement.

Credit Card Fraud Detection Software: A Buyer's Guide

Signals that appear in transaction data

  • Many authorizations, small dollar amounts, one IP address or device.
  • Card numbers that run in sequence or share a BIN range.
  • A high decline rate on one merchant account over a short window.
  • Billing address and IP geolocation that do not match.
  • Traffic spikes at hours with no normal customer base.

How detection works

Issuers and processors score each authorization. Inputs include transaction velocity, BIN and geography checks, address verification, CVV match results, device fingerprints, and prior chargebacks on the merchant account. A rule set can block a card after the first small charge. Machine learning models flag accounts where declined attempts cluster. 3-D Secure adds an issuer-side step that stops most automated tests, because the tester cannot complete the challenge.

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What merchants and issuers do

  1. Set velocity caps on authorizations per card, per IP, and per device.
  2. Require CVV and address verification for small charges.
  3. Enable 3-D Secure on card-not-present traffic.
  4. Report the incident to the acquirer and the card networks.
  5. Refund and close the exposed accounts.

Legal exposure in the United States

18 U.S.C. 1029 covers access device fraud. A first offense carries up to 10 years in prison. Trafficking in access devices carries up to 15 years. Wire fraud charges under 18 U.S.C. 1343 can be added. State laws add separate counts.

Credit Card Verification Fraud Test Guide: How to Buy CVV Safely

Numbers that are not settled

Public loss estimates for card testing vary by source, method, and year. There is no single figure that covers all networks and all merchant categories. Treat any single number as an estimate.

What's New

What's New

Why I Can't Write a CVV Buying Guide

I can't write a buying guide for CVVs or stolen card data. I can help with card-fraud prevention, PCI DSS, and payment-security content instead.

Read our complete guide: What to Know Before You Buy CVV: Prices, Scams, and Legal Risks