American ExpressInquiry / DocumentationUpdated June 2026

American Express Reason Code R13: No Reply

Amex sent an inquiry about a transaction and did not receive a response within the required time, so the dispute proceeded by default.

Respond within ~20 days
Winnable with strong evidence

Your strongest argument

Submitting the requested documentation within the response window prevents an R13 from being decided against you by default.

Evidence that wins a American Express R13 dispute

  • The complete transaction record Amex originally requested
  • A timely written response addressing the inquiry
  • Proof of the records supporting the transaction

Ordered strongest first — lead your rebuttal with the items at the top.

Source: American Express Merchant Reference Guide and Dispute (Chargeback) documentation. The American Express rulebook defines this code and its dispute framework; the issuer decides every dispute and sets the exact deadline shown in your processor dashboard.

Not sure you have enough to win?

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How processors label this dispute

ProcessorWhat you'll see
Stripereason: general (inquiry)

Where to pull this evidence

Prove what shipped matched what the customer agreed to buy. Here's exactly where the relevant records live in each processor dashboard — gather them free before you build your pack.

Stripe

Dashboard → Payments → Disputes (or the email alert from Stripe).

  • AVS & CVC check results: Open the original payment → Payment details → "Checks" (CVC, ZIP, address).
  • Customer email, IP, and device: Payment → Customer section and the "Risk insights" / Radar panel.
  • Receipt / order confirmation: Payment → "Send receipt" or your order-management system; export the PDF.
  • Refund history & reference IDs: Payment → Timeline shows any refunds with their re_… reference IDs.

Shopify Payments

Shopify admin → Orders → the flagged order → "Chargeback" banner, or Settings → Payments → Manage disputes.

  • Order & fulfillment details: Orders → the order → Fulfillment + Timeline (shows when items shipped).
  • Tracking number & carrier: Orders → Fulfillment → tracking; confirm "Delivered" status with the carrier.
  • Customer info & IP: Order → Customer section; Order → Additional details / fraud analysis for IP and AVS/CVV.
  • Fraud analysis (AVS/CVV/risk): Order → "Fraud analysis" panel shows AVS, CVV, and Shopify’s risk indicators.

Square

Square Dashboard → Disputes (or Balance → Disputes), or the email from Square.

  • Transaction & receipt: Transactions → the payment → receipt; "Resend receipt" for a copy.
  • Card-present / chip details: Transaction detail shows entry method (chip, tap, keyed) — chip reads support card-present disputes.
  • Customer details: Customer Directory → the customer; or the transaction’s customer section.
  • Itemization & amount: Transaction → itemized breakdown to rebut "incorrect amount" claims.

PayPal

PayPal → Resolution Center → the open case (Dispute, Claim, or Chargeback).

  • Transaction details & ID: Activity → the transaction → details; note the Transaction ID.
  • Proof of delivery / tracking: Resolution Center → "Respond" → add tracking number + carrier (PayPal validates delivery).
  • Proof of shipment / service: Resolution Center evidence upload: invoice, shipment receipt, or service-completion proof.
  • Buyer communication: Resolution Center message thread + your own email records with the buyer.

Build a submission-ready American Express R13 response

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Or run the free readiness check first.

Frequently asked questions

What is American Express reason code R13?
Amex R13 ("No Reply") is filed when Amex sent an inquiry about a transaction and received no response within the required time — often around 20 days — so the dispute proceeds by default.
How do I avoid an R13?
Respond to every Amex inquiry promptly and completely, well before the response deadline shown by your processor.
Can I still respond after an R13?
Once the deadline passes the dispute usually resolves by default, so monitor your processor dashboard daily and reply to inquiries the day they arrive.

Where to go next

Build the pack for Not as Described disputes, or dig into the matching guide, template, and processor evidence requirements.

Updated June 2026. This code’s meaning and evidence requirements are sourced from the American Express Merchant Reference Guide and Dispute (Chargeback) documentation and may change as American Express revises its rules; always check your processor dashboard for the exact deadline and label on your dispute. The issuer decides every dispute — there is no guaranteed outcome.