Reason code · American Express
Amex R03: insufficient reply
R03 means you replied to an Amex inquiry, but the reply fell short: incomplete, off-topic, missing a policy, or explaining only part of the amount. At this stage Amex’s guide lists one response: a refund already processed.
What R03 means
R03 means you did reply to Amex’s inquiry, but Amex found the reply wasn’t enough. An inquiry is Amex asking for your side before money moves. Amex’s guide lists what makes a reply insufficient:
- The explanation is incomplete or doesn’t address the dispute reason or every claim the Card Member made.
- Documents are missing, such as the cancellation, return or refund policy, or the agreement terms.
- The documents don’t match the disputed charge, amount or Card Member.
- You explained a partial credit, but not why the rest isn’t owed.
Where it comes from
R03 follows an inquiry. Checkout.com marks it as requiring one first. So the customer’s complaint came earlier, and R03 is Amex’s verdict on your answer to it.
Time limit
Processor guides list R03 at 120 days from the transaction date.
Your side of the clock is short. Amex’s own guide tells merchants to respond within 20 days. If you accept Amex through a processor such as Stripe or Square, the processor sets its own date, often a shorter one. The due date on your notice is the one that counts.
What proof matters now
Amex’s guide lists one response to R03: proof that a refund directly offsetting the charge has already been processed. That’s the hard truth of this code. The case was decided on the reply you already sent.
The inquiry reply is the whole case
Merchants often treat an inquiry as a formality and save their effort for a chargeback. Amex works the other way. Its guide tells merchants to answer every claim the Card Member made, validate the amount billed, include the documents requested, and explain any partial credit with support, such as a non-refundable cancellation fee in the policy the customer accepted.
Partial credits trip people up most. Refund part, keep part, and say nothing about why, and Amex sees an unexplained remainder.
The common mistake
Answering the claim you expected instead of the one the customer made. Read the inquiry, list every claim in it, and answer each one.
Dispute Daddy builds this for you
Upload the notice and your records. Dispute Daddy builds a response around the reason Amex actually gave, and you approve it before you submit. See how the method works.
