American Express Chargeback Codes

Chargeback Reason Codes for American Express (AMEX)

Following is the list of Chargeback Reason Codes used by American Express (AMEX):

American Express operates as both the card network and the card issuer for the majority of its cardholders, which makes its dispute process meaningfully different from Visa and Mastercard. Because Amex controls both sides of the transaction, it has greater direct authority over dispute decisions and tends to resolve disputes more quickly — but also more often in the cardholder's favor. Merchants should approach Amex chargebacks with thorough documentation from the outset, as the representment process offers less room for back-and-forth than Visa or Mastercard disputes.

Amex uses alphanumeric reason codes (e.g., C02, FR2, R01) rather than the numeric codes used by Visa and Mastercard. The letter prefix gives you an immediate category signal: A codes are inquiry/information requests, C codes are cardholder disputes, FR codes are fraud, P codes are processing errors, R codes are non-receipt or transaction information requests, and M codes indicate Amex accepted the chargeback on the merchant's behalf.

American Express Chargeback Codes
Code	Category	Description
A02	Request for Information	No Authorization
C02	Cancelled/Returned by Cardholder	Credit not Processed
FR2	Fraud	Fraudulent Transaction
P08	Processing Error	Paid By Other Means
P17	Request for Information	Debit Adjustment
R01	Non-Receipt of Goods or Services	Non-Receipt of Merchandise
R03	Request for Information	Fraudulent Transaction
R04	Cancelled/Returned by Cardholder	Not as Described or Defective Merchandise
R13	Request for Information	Requested Transaction Information Not Received
M01	Request for Information	Merchant Accepted Chargeback
M04	Cancelled/Returned by Cardholder	Merchant Accepted Chargeback
R14	Request for Information	Requested Transaction Information Not Received
R17	Request for Information	Non Dispute Adjustment
S01	Request for Information	Non Dispute Adjustment
R12	Request for Information	Notification
R21	Request for Information	Non Dispute Adjustment

MasterCard Chargeback Codes | Visa Chargeback Codes | Amex Chargeback Codes | Discover Chargeback Codes

Understanding Amex Chargeback Categories

Fraud (FR2)

FR2 (Fraudulent Transaction) is Amex's primary fraud code. Because Amex is typically both the issuer and network, it investigates fraud claims directly. For card-present transactions, EMV chip acceptance is your primary liability protection. For card-not-present transactions, strong fraud screening and documented customer authentication are essential. Unlike Visa's 3DS liability shift, Amex's SafeKey (its 3DS equivalent) also provides fraud liability shift for participating merchants — if you're processing significant Amex CNP volume, SafeKey enrollment is worth implementing.

Cardholder Disputes (C02, R04)

C02 (Credit Not Processed) means the cardholder claims they returned merchandise or cancelled a service but the credit wasn't applied. Respond with your refund records and the date the credit was processed. If the credit was issued, provide the reference number — Amex will verify it with the issuing bank. R04 (Not as Described or Defective Merchandise) requires product descriptions, photos, and documentation showing the item matched its listing and arrived in acceptable condition.

Non-Receipt & Information Requests (A02, R01, R13, R14)

R01 (Non-Receipt of Merchandise) is Amex's non-delivery code. Signed delivery confirmation and trackable shipping records are your core response documents. For digital goods, access logs, download records, and IP confirmation serve the same function. A02 (No Authorization) and the R-series information request codes typically require you to provide transaction documentation — authorization records, signed receipts, or proof the cardholder agreed to the charge.

M Codes — Merchant Accepted Chargebacks (M01, M04)

M01 and M04 indicate Amex accepted the chargeback on the merchant's behalf — meaning Amex reviewed the dispute and determined the merchant's case wasn't strong enough to warrant a representment, or the merchant agreed to accept the chargeback. These aren't dispute codes you respond to; they're informational notifications that the case is closed.

Key Differences: Amex vs. Visa/Mastercard Disputes

Several Amex-specific characteristics affect how merchants should approach disputes:

• Shorter response windows — Amex typically gives merchants 20 days to respond to a chargeback, compared to 30–45 days for Visa and Mastercard
• Direct issuer authority — because Amex is often both network and issuer, its decisions on disputes are final without the additional arbitration layer available in Visa/Mastercard cases
• Higher-value cardholders — Amex cardholders tend to be higher-spend customers who are accustomed to favorable dispute outcomes; clear billing descriptors and proactive customer service reduce unnecessary disputes
• Billing descriptor recognition — "I don't recognize this charge" is a disproportionate source of Amex disputes; ensuring your descriptor clearly identifies your business is one of the highest-ROI prevention steps

For merchants with elevated Amex dispute rates, chargeback prevention monitoring — which intercepts disputes before they formally file across all card networks including Amex — provides meaningful protection. Fraud screening reduces FR2 exposure by blocking fraudulent transactions before authorization.

CyoGate offers numerous tools and techniques to help minimize chargeback ratios. If you need assistance with managing chargebacks, please contact us today!