Discover Reason Code UA05

What is

Discover Reason Code UA05

?

A counterfeit card was used in a card-present transaction.

Why this happens

A cloned/counterfeit card was used at a physical terminal.

What this means for each merchant

Card-present only, rarely relevant to pure online storefronts.

Evidence that typicalls wins this

Terminal transaction log showing how the card was read.

How to fight it

Submit the terminal's transaction log showing the read method used.

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Common mistakes

Still relying on magnetic-stripe fallback at EMV-capable terminals.

How to prevent it

Disable or restrict magnetic-stripe fallback on EMV-capable terminals where possible.

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