What Evidence Do You Need to Dispute an Unauthorized Transaction

To successfully dispute an unauthorized transaction with your bank or card issuer, gather specific evidence showing you did not authorize the charge. Key pieces include transaction records like order confirmations, IP address mismatches, device ID mismatches, login activity, AVS/CVV verification results, and your purchase history with the merchant. For example, a lack of previous transactions or mismatches in your purchase history can strengthen your case under Visa Compelling Evidence 3.0 rules as of 2026.

As a cardholder in Colombia or elsewhere, ask your bank to check merchant-held records such as these, which often reveal fraud indicators. This method, drawn from merchant dispute practices on platforms like Visa and Mastercard, safeguards your account and aids fund recovery. Banks evaluate such proof against fraud claims, emphasizing digital footprints and prior behavior over a simple statement.

Understanding Unauthorized Transaction Disputes and Common Reason Codes

Unauthorized transaction disputes arise when a cardholder claims a charge they did not approve, typically in card-not-present settings like online purchases. Visa reason code 10.4, Fraud - Card Absent Environment, applies when the card was not physically present (The Ultimate Chargeback Reason Code Comparison Guide for Merchants).

American Express uses its own equivalent for these unauthorized claims (Understanding Common Chargeback Codes: What They Mean for Merchants (VISA, MasterCard & American Express) - XCaliber Solutions). Grasping these codes clarifies the evidence your bank or issuer requires. Merchants counter disputes with proof of customer intent, and you can reference comparable records to highlight mismatches suggesting fraud.

Essential Evidence Types to Gather for Your Dispute

Follow this workflow to collect evidence for your dispute:

1. Request transaction records from your bank: Seek details on order confirmations, customer IP address, email address, device ID, and login activity linked to the charge. Mismatches here can tie the purchase to unfamiliar devices or locations (Understanding Common Chargeback Codes: What They Mean for Merchants (VISA, MasterCard & American Express) - XCaliber Solutions).

2. Verify fraud filters and matches: Check AVS (Address Verification Service) and CVV results to see if the buyer supplied correct billing details and security codes. Include these with delivery confirmation for physical goods or digital consent for digital items where available.

Provide these to your issuer, presenting them as records the merchant holds to validate the transaction. Such details prove central in disputes. Your bank can access or subpoena merchant data as part of the review.

Using Purchase History as Compelling Evidence (Visa CE 3.0 and Beyond)

As of 2026, Visa Compelling Evidence 3.0 rules permit purchase history to affirm a disputed transaction's legitimacy. A lack of two previous transactions with the merchant bolsters your fraud claim (Challenging Transaction Disputes Under Visa Compelling Evidence 3.0 | Accertify).

Your complete cardholder purchase history with the merchant can reinforce this by revealing inconsistent patterns. Reference these in your submission--have your bank retrieve statements or merchant data on prior purchases. This prior transaction evidence directly challenges unauthorized claims under CE 3.0.

How to Choose the Right Evidence for Your Dispute Situation

Tailor evidence to your scenario for maximum effect. Focus on digital footprints for online card-not-present (CNP) disputes and history for ongoing merchant relationships.

Start with elements matching your activity (like IP or device for online cases), then add history if relevant. Have your bank verify merchant records accordingly.

FAQ

What is Visa reason code 10.4 for unauthorized transactions?

Visa code 10.4, Fraud - Card Absent Environment, covers claims of unauthorized transactions where the card was not physically present, such as online purchases (The Ultimate Chargeback Reason Code Comparison Guide for Merchants).

Does purchase history help win an unauthorized transaction dispute?

Yes, a cardholder’s purchase history, especially two previous transactions with the merchant, proves legitimacy under Visa Compelling Evidence 3.0 (Accertify; Checkout.com).

What records show customer intent in a dispute?

Records like order confirmations, customer IP address, email address, device ID, and login activity demonstrate intent (XCaliber Solutions).

How does AVS or CVV matching support my claim?

AVS and CVV matches confirm the buyer used correct billing details and security codes, activating fraud filters (XCaliber Solutions).

Can prior transactions between me and the merchant prove authorization?

Yes, evidence of two previous transactions serves as compelling proof under Visa CE 3.0 (Accertify).

What is Visa Compelling Evidence 3.0 and how does it apply?

Visa Compelling Evidence 3.0 uses prior transactions and purchase history to validate disputed charges, helping issuers rule in favor of legitimate activity (Checkout.com; Accertify).

Next, contact your bank immediately with the evidence outlined, requesting they review merchant records. Monitor your account closely and keep detailed notes of all communications.