Understanding Chargeback Reason Codes

Every dispute has a reason, and it shapes your response. Here is how to read reason codes.

September 3, 2026 · 3 min read

The reason shapes everything

A chargeback comes with a reason code that says why the customer or bank is disputing. That reason determines what evidence will actually be persuasive, so understanding it is the starting point of any response.

Different reasons, different proof

A dispute claiming the item never arrived is answered with delivery proof; one claiming the charge was unauthorized needs different evidence entirely. Matching your response to the reason is what makes it effective.

Read past the label

Reason codes can be vague or even inaccurate. Reading the underlying claim, not just the label, helps you understand what the customer is really disputing and respond to the actual issue.

Respond to the specific claim

A generic response ignores the reason and often loses. Addressing the specific claim head on, with evidence chosen for it, is the difference between a packet that answers the dispute and one that talks past it.

Key takeaways

The reason code shapes your whole response
Different reasons require different evidence
Read the underlying claim, not just the label
Respond to the specific claim, not generically

Written by

Julien Jimenez

Julien Jimenez is an independent software builder based in Paris. He designs, ships, and operates focused SaaS products for small businesses and independent professionals. Read the full author page.