Amex Reason Code R03: Insufficient Reply

What Amex reason code R03 means

R03 means you answered, but not well enough. American Express typically opens a dispute with an inquiry that asks for specific documentation, such as proof of delivery, a signed receipt, or a copy of the cancellation policy. If your reply doesn’t include what was requested, or the documents don’t support the charge, Amex can charge the transaction back under R03.

It’s the close cousin of R13 No Reply. R13 is no answer at all; R03 is an answer that didn’t do the job.

Common causes

• One-line replies (“the item was delivered”) without tracking or order records attached
• Sending generic evidence instead of what the inquiry specifically asked for
• Missing the key document for the claim: delivery proof for non-receipt, verification data for fraud, the policy for cancellation
• Attachments that failed to upload or were unreadable
• Replies written for the wrong claim type

Evidence that wins an R03 dispute

1. Your original inquiry reply, with submission confirmation and timestamp.
2. The documents you sent, to show the reply was in fact complete and responsive.
3. Proof of a prior credit, if you refunded the Card Member before the chargeback.
4. Any additional documentation your acquirer confirms can still be submitted for your case.

Match the reply to the request

How to prevent R03 disputes

• Read the inquiry’s specific request and answer it point by point.
• Match evidence to the claim: tracking and address match for non-receipt (see C08); AVS, CID, IP and order history for fraud (see F29); policy and timeline for cancellation.
• Include a short cover letter that maps each document to the question it answers. See our rebuttal letter template.
• Check that every attachment uploaded and is legible before submitting.

Should you fight or accept?

Fight only when you can show your reply was complete and on time, or that you already credited the Card Member. Otherwise accept, and review the reply that failed. R03s nearly always point to a gap in how evidence is gathered or matched to the claim.