I never saw the inquiry. Can the chargeback be reversed?

Possibly, if you can show through your processor that the inquiry was misdelivered and you respond promptly with full evidence once notified. Reopening is discretionary, so fix the delivery channel either way.

Are R13 chargebacks counted against my dispute ratio?

Yes, they count like any chargeback, and the non-response itself is separately tracked. High R13 rates are a known trigger for Amex removing the inquiry stage from your account entirely.

How much time do I get to answer an Amex inquiry?

Typically about 20 days from the inquiry date, though your agreement governs. Build your internal deadline well inside it, because a day late produces the same R13 as never answering.

American Express · Processing Errors

Reason code R13: No Reply

R13 means Amex sent the merchant an inquiry about a cardmember's dispute and received no response within the deadline, so the case defaulted to a chargeback. The underlying complaint could have been anything; the code records only the silence.

Issuer filing window

issued automatically when the merchant's inquiry deadline passes without a response

Merchant response window

typically 20 days to answer the original inquiry; after an R13 posts, further response rights are limited

Why R13 chargebacks happen

Inquiry notices went to an outdated mailing address, email, or portal nobody monitors.
The processor or OptBlue provider relayed the inquiry late or into an unmonitored channel.
Dispute volume outran the team, and inquiries aged past deadline in a queue.
The merchant deliberately ignored inquiries, not realizing non-response creates the chargeback and damages account standing.
Ownership was unclear between an agency, a fulfillment partner, and the merchant, so nobody replied.

How to fight a R13 chargeback

Check whether a post-chargeback response window exists for the underlying claim, and file complete evidence immediately if so.
If the inquiry provably never reached you, document the delivery failure through your processor and request the case be reopened.
Reconcile all R13 debits and prioritize recovering the largest ones where any response path remains.
Fix intake first: until inquiries reliably reach a monitored queue, fighting individual R13s is bailing a leaking boat.

How to prevent R13 chargebacks

Register current contact details with Amex and your processor, and confirm the inquiry delivery channel after any address or provider change.
Monitor the Amex merchant portal or your processor's dispute feed daily, with alerting on new inquiries.
Set internal response deadlines several days inside Amex's, with escalation when a case sits untouched.
Assign named ownership for Amex disputes; the inquiry flow only works for merchants who answer it.
Automate acknowledgment and evidence assembly so an inquiry can never silently expire.

Frequently asked questions

I never saw the inquiry. Can the chargeback be reversed?: Possibly, if you can show through your processor that the inquiry was misdelivered and you respond promptly with full evidence once notified. Reopening is discretionary, so fix the delivery channel either way.
Are R13 chargebacks counted against my dispute ratio?: Yes, they count like any chargeback, and the non-response itself is separately tracked. High R13 rates are a known trigger for Amex removing the inquiry stage from your account entirely.
How much time do I get to answer an Amex inquiry?: Typically about 20 days from the inquiry date, though your agreement governs. Build your internal deadline well inside it, because a day late produces the same R13 as never answering.

Related American Express codes