Discover Reason Code UA06: Fraud, Chip and PIN

What Discover reason code UA06 means

UA06 covers fraud with a lost, stolen or never-received chip-and-PIN card. Someone used the genuine card in person, and the transaction went through without the PIN being checked, often because the terminal had no PIN pad or skipped PIN entry.

PIN verification is what protects a chip-and-PIN card from being used by whoever finds it. When the issuer issued a PIN-preferring card and the merchant’s terminal couldn’t verify the PIN, liability for the fraud generally falls on the merchant. Many US-issued cards are chip-and-signature or no-signature cards, so UA06 most often involves cards issued with PIN as the preferred verification method, such as many cards issued outside the US.

UA06 rarely applies to ecommerce. It depends on a physical card at a terminal. Online fraud claims come through as UA02.

Common causes

• Terminals with chip readers but no PIN pad
• Terminals configured to skip PIN entry for some transactions
• Stolen cards used quickly at stores, hotels or restaurants before being reported

Evidence for a UA06 dispute

1. Terminal capability: proof the terminal could accept and verify a PIN at the time.
2. Verification method: the transaction record showing the PIN was entered and verified.
3. Entry mode and authorization: the chip-read indicator, approval code and amount.

If the terminal verified the PIN, those records are usually enough. If it couldn’t, there is little to argue.

How to prevent UA06 chargebacks

• Use terminals that support PIN entry, especially if you serve international travelers.
• Don’t override or skip PIN prompts to speed up checkout.
• For high-value in-person sales, check the cardholder’s ID where your processor’s rules allow.

Should you fight or accept?

Fight when the terminal record shows a chip read with the PIN verified.

Accept when the terminal couldn’t take a PIN. That loss generally sits with the merchant under the liability rules, and upgrading the terminal is the fix.