American Express Chargeback Reason Codes: Full List
American Express chargeback reason codes sort every Amex chargeback into 34 codes across six categories, from cardholder disputes and fraud to processing and authorization errors. Each code sets its own required evidence, and the code on your dispute notice tells you what to submit.
I've disputed chargebacks and built evidence for my own stores. Later I spent years advising merchants on the same thing. The same pattern kept showing up. Most of the losses were friendly fraud that a clearer billing descriptor would have stopped.
Read the code first, and you'll know what evidence answers it and how long you have.
Key takeaways
- American Express groups every chargeback into 34 reason codes across six categories.
- The code on your notice sets the required evidence and your response deadline.
- You get 20 days to respond to any Amex chargeback, whatever the code.
- FR4 and FR6 add a 7-calendar-day refund window on top of that.
- In our dataset, Amex is 6.9% of alerts with a recorded card brand.
What are American Express chargeback reason codes?
American Express sorts every chargeback into one of 34 reason codes across six categories. The code decides your evidence and your deadline. A dispute reason code, also called a chargeback reason code, is the label Amex puts on the reversal.
Amex assigns the code when the cardholder or their bank files the dispute. It follows the reason they give. A "never received it" claim, a fraud claim, and a billing error each route to a different code. So one complaint can land under different codes.
Here Amex is both the card network and the bank, so the code comes straight from them.
The category matters more than the number. A fraud code and a processing-error code need different evidence. Read the number, skip the description, and you can submit the wrong package.
For the wider dispute process, see our American Express chargeback guide.
1. Card Member (Cardholder) Dispute codes
The Card Member Dispute group covers 11 codes for disputes the cardholder files directly. Most involve goods or services falling short of what you promised. You'll see these codes most. They turn on proof of what you sent and what the customer agreed to:
| Code & title | Description | Common causes | Prevention | Evidence to submit |
|---|---|---|---|---|
| C02 Credit not processed | The cardholder expected a refund or credit that never appeared. | A refund was promised but not issued, or issued to the wrong account. | Process refunds promptly and confirm them in writing. | Proof the credit was issued, or the reason it wasn't owed. |
| C04 Goods returned or refused | The cardholder returned or refused goods and wasn't credited. | A return was received but not refunded, or your return policy wasn't shown. | Publish a clear return policy and refund on receipt. | Return-policy terms and proof of whether goods came back. |
| C05 Goods or services cancelled | The cardholder says they cancelled the order or service. | A cancellation request wasn't honored, or your policy was unclear. | Confirm cancellations in writing and state your terms at checkout. | Cancellation terms and records of what the customer agreed to. |
| C08 Goods or services not received | The cardholder never got what they paid for. | No delivery, late delivery, or a service not rendered. | Use tracked delivery and confirm service completion. | Delivery confirmation, tracking, or proof of service delivery. |
| C14 Paid by other means | The cardholder says they already paid another way. | A duplicate charge after a cash, check, or other-card payment. | Reconcile payments before charging the card on file. | Records showing the Amex charge was the only payment taken. |
| C18 No-show or CARDeposit cancelled | A lodging or reservation deposit is disputed as cancelled. | A no-show charge applied after a valid cancellation. | Follow Amex's no-show and deposit rules exactly. | Cancellation-policy terms and the reservation record. |
| C28 Cancelled recurring billing | The cardholder cancelled a subscription but was still billed. | Billing continued after a cancellation request. | Stop billing on cancellation and confirm it by email. | The cancellation date and proof billing stopped on time. |
| C31 Not as described | Goods or services didn't match the description. | A listing that overstated the product or omitted key details. | Describe products accurately and keep listings current. | The listing, order details, and what was actually delivered. |
| C32 Damaged or defective | Goods arrived damaged or defective. | A quality or shipping-damage issue. | Inspect before shipping and use protective packaging. | Proof the item shipped in good condition and any return record. |
| M10 Vehicle rental, capital damages | A car-rental capital-damages charge is disputed. | A damage charge the renter disputes or wasn't told about. | Document vehicle condition and disclose damage terms. | Rental agreement, condition reports, and damage evidence. |
| M49 Vehicle rental, theft or loss of use | A theft or loss-of-use rental charge is disputed. | A charge for theft or lost rental days the renter contests. | Keep signed agreements and document the loss. | Rental agreement, police or incident report, and loss records. |
Summary: Card Member Dispute codes turn on what you delivered and what the customer agreed to, so clear terms and delivery proof win most of them.
2. Fraud codes
The Fraud category covers 6 codes for disputes the cardholder or their bank says weren't authorized. Most are card-not-present disputes, where friendly fraud hides:
| Code & title | Description | Common causes | Prevention | Evidence to submit |
|---|---|---|---|---|
| F10 Missing imprint | No card imprint exists for a disputed transaction. | A manual or key-entered sale with no imprint record. | Capture a card imprint or use chip and PIN in person. | The imprint record or proof of a valid card-present method. |
| F14 Missing signature | No cardholder signature backs the transaction. | A signed receipt is missing for a card-present sale. | Collect and keep signed receipts where required. | The signed receipt or proof of an approved no-signature method. |
| F24 No cardmember authorisation | The cardholder says they didn't authorize the charge. | Account takeover, stolen details, or friendly fraud. | Use fraud screening and verify high-risk orders. | Proof of authorization, AVS or CVV match, and prior use. |
| F29 Card not present | A card-not-present sale is claimed as unauthorized. | An online or phone order the cardholder denies. | Verify identity and keep detailed transaction records. | IP, device, delivery, and history tying the buyer to the card. |
| F30 EMV counterfeit | A counterfeit card was used at a non-EMV terminal. | A magstripe fallback on a chip-capable card. | Use EMV chip readers for every in-person sale. | Proof the terminal read the chip rather than the magstripe. |
| F31 EMV lost, stolen, or not received | A lost, stolen, or never-received card was used. | A physical card used before the cardholder reported it. | Use EMV and prompt for a PIN on in-person sales. | Proof of a valid chip-and-PIN transaction. |
Summary: Fraud codes claim the charge wasn't authorized, and on card-not-present sales your records tying the buyer to the card are what separate real fraud from friendly fraud.
3. Processing Error codes
The Processing Errors category covers 8 codes for disputes caused by a mistake in processing the charge. Here your own systems are usually the cause. Prevention is about billing and point-of-sale setup:
| Code & title | Description | Common causes | Prevention | Evidence to submit |
|---|---|---|---|---|
| P01 Unassigned card number | The charge used a card number Amex hasn't issued. | A mis-keyed or invalid card number. | Validate card numbers at entry and avoid manual keying. | Proof the number was valid and correctly captured. |
| P03 Credit processed as charge | A refund was submitted as a charge. | A transaction-type error at submission. | Check transaction type before submitting. | Records showing the correct transaction type. |
| P04 Charge processed as credit | A charge was submitted as a credit. | A transaction-type error at submission. | Check transaction type before submitting. | Records showing the intended and actual transaction type. |
| P05 Incorrect charge amount | The amount charged differs from the agreed amount. | A keying error or a price change after the sale. | Confirm the final amount before submitting the charge. | The agreed price and proof of what the customer approved. |
| P07 Late submission | The charge was submitted after the allowed window. | A delay between the sale and settlement. | Submit transactions within Amex's time limits. | Proof the charge was submitted on time. |
| P08 Duplicate charge | The same transaction was charged more than once. | A double submission or a retried payment. | Add duplicate-charge checks before submitting. | Records showing each charge was a separate valid sale. |
| P22 Non-matching card number | The submitted number doesn't match the card used. | A transcription error between authorization and settlement. | Reconcile the authorized and settled card numbers. | Proof the same card was authorized and charged. |
| P23 Currency discrepancy | The charge currency differs from what was agreed. | The wrong currency applied at checkout. | Set and confirm the transaction currency clearly. | Proof of the agreed currency and the amount shown. |
Summary: Processing-error codes come from your own billing and point-of-sale setup, so the fix is configuration rather than a stronger evidence package.
4. Authorization codes
The Authorization category covers 3 codes for charges run without a valid or current approval. The purchase may be fine, but the approval step is what's in question here:
| Code & title | Description | Common causes | Prevention | Evidence to submit |
|---|---|---|---|---|
| A01 Charge exceeds authorisation | The charge is higher than the amount authorized. | A tip, add-on, or price change above the approved amount. | Authorize the full amount before charging. | The authorization record and the final agreed amount. |
| A02 No valid authorisation | The charge went through with no valid authorization. | A declined or missing authorization that was charged anyway. | Never charge on a decline. Get a fresh approval. | Proof of a valid, approved authorization. |
| A08 Authorisation approval expired | The authorization had expired before the charge settled. | A long gap between approval and settlement. | Settle within the authorization's valid window. | Proof the charge settled while the approval was valid. |
Summary: Authorization codes are about the approval, so authorize the full amount, never charge a decline, and settle before the approval expires.
5. Chargeback Program codes: FR2, FR4, and FR6
FR2, FR4, and FR6 are Amex's chargeback programs for specific fraud patterns. They carry the same 20-day response window as standard codes. A program code keeps that deadline and changes the liability default instead.
Amex applies the chargeback automatically once the pattern matches. So you're contesting a default it already set.
FR4 and FR6 add a separate 7-calendar-day refund window. That window is prevention guidance that runs alongside the same 20-day response deadline. Here's how the three break down:
| Code & title | What it means | Note |
|---|---|---|
| FR2 Fraud Full Recourse Program | Amex charges back fraud disputes by default for enrolled merchants. | Enrollment follows repeated fraud over Amex's threshold. |
| FR4 Immediate Chargeback Program | Amex charges back qualifying disputes without an inquiry first. | Refund within 7 calendar days to prevent the chargeback. |
| FR6 Partial Immediate Chargeback Program | A partial version of the immediate chargeback default. | Same 7-calendar-day refund window applies. |
A program code still gives you the full 20 days to respond. What changes is what the response can achieve, because an automatic liability default is harder to reverse than an open dispute.
Other Amex chargeback codes: R03, R13, and M01
R03 and R13 cover a weak or missing reply to a prior inquiry. M01 covers a chargeback you already agreed to. These last three are process codes more than dispute codes.
Amex's process includes a pre-chargeback inquiry step. Fail to reply, or reply with too little, and the inquiry becomes a chargeback under R03 or R13. Here's what each one means:
| Code & title | What it means | Prevention |
|---|---|---|
| R03 Insufficient reply | Your reply to an inquiry lacked enough detail. | Answer inquiries fully, with all requested records. |
| R13 No reply | No reply reached Amex within the inquiry window. | Track inquiry deadlines and reply on time. |
| M01 Chargeback authorisation | You authorized the chargeback in advance. | Confirm before agreeing to any chargeback authorization. |
An R13 is preventable by process alone. Reply to the inquiry on time and with enough detail. Then a dispute you'd otherwise win never becomes a chargeback.
How much time you have to respond to an Amex chargeback
Amex gives you 20 days from the chargeback notification date to respond, whatever reason code applies. The deadline is the same across every code.
Visa and Mastercard vary their response windows by dispute phase or stage. Amex applies one flat deadline instead. That's why every reference on this topic states the same 20 days without a per-code table. Your clock starts on the notification date.
Miss the 20-day window and you forfeit the dispute, however strong your evidence is. The deadline is procedural, so a late response loses a case you could have won.
Where American Express alert coverage falls short
Amex chargeback alerts need a separate enrollment from the Visa and Mastercard alert setup most merchants already run. Amex is also a smaller share of what chargeback alerts catch.
Rely on the same setup that protects your Visa and Mastercard volume, and Amex disputes can slip through.
Ethoca is the Mastercard-owned network behind many of those alerts. It covers Amex only through a separate, on-request MID enrollment. So Amex protection doesn't switch on automatically with Mastercard.
In our dataset, Amex is 6.9% of alerts with a recorded card brand. That share sits low mainly because few Amex disputes get captured as alerts. So it reads below Amex's real dispute rate.
Enroll for Visa and Mastercard, assume Amex comes with it, and you'll get no Amex alerts. That holds until you request the separate enrollment. Ask your provider whether Amex is covered before you count on it.
Wrapping up: what to do with an Amex reason code
The code on your Amex notice tells you what to submit and how long you have. The categories that keep repeating for your business are the ones worth fixing at the root.
Fighting one dispute at a time treats the symptom, while the pattern in your codes points at the cause.
When Card Member Disputes dominate, the fix is clearer descriptions, delivery proof, and honest cancellation terms. If Processing Errors dominate, it's your billing and point-of-sale setup.
A clearer billing descriptor also cuts the friendly-fraud disputes customers file when they don't recognize a charge. That's where I saw the most avoidable losses, on my own stores and the merchants I advised. For a full walkthrough, read our guide on winning an Amex dispute.
With a live code in hand, look up the reason code in our lookup tool.
How we sourced our data
The Amex alert-share figure here comes from anonymized, aggregated alert data across merchants on Chargeback.io. We measured total alerts by card brand and report them as shares of the total.
The number reflects alerts our own platform processed, so it describes our merchants rather than the payments industry. Amex coverage is one brand among several, and it runs thinner than Visa and Mastercard.
FAQ
What is the American Express Immediate Chargeback Program?
The Immediate Chargeback Program is Amex's FR4 code, where Amex charges back a qualifying dispute by default. Refund the cardholder within 7 calendar days to prevent it.
How do you prevent an American Express dispute?
Prevent most Amex disputes with clear billing descriptors, accurate descriptions, delivery proof, and prompt refunds. Set up chargeback alerts too, and note that Amex takes its own enrollment separate from Visa and Mastercard.
Does Chargeback.io alert coverage include American Express?
Amex needs a separate Ethoca MID enrollment on request, so your Visa and Mastercard coverage skips it. Ask us to add Amex coverage rather than assuming your setup includes it.
What if I miss the 20-day Amex response window?
Missing the window closes the dispute as a loss, with no appeal on the merits after that. The forfeit is automatic, however strong your evidence was.
