NMI, Aug 7, 2026, 5 min read
NMI is your payment gateway, not your dispute handler. Your acquirer and the issuer own the chargeback process. Find the reason code on the notice, check the deadline your processor shows, gather the evidence for that exact code, and file a reason-code-specific letter. A gateway dashboard alone does not answer a fraud claim, a not-received claim, or a not-as-described claim. The letter has to match the code.
When you are ready, generate the letter for your code. $15 flat, about five minutes, Visa and Mastercard.
Start your letter · $15 Back to the blog
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