Amex R13
No reply
American Express raises R13 when a previous request for information went unanswered inside the stated window. It is a procedural reversal, not a claim about the sale.
We do not cover this code
R13 means American Express did not receive a reply to an earlier enquiry, so the charge was reversed. There is no evidence pack for it: contact American Express through your processor about the original enquiry.
Reply to your processor directly with what it asks for. We would rather say that than sell you a document that cannot help.
See the codes we do coverRules checked 2026-09. Sources. Network rules change; if you find this page out of date, tell us and we will correct it.