American Express Disputes Reference Guide
American Express merchant-facing guide for responding to disputes and managing documentation.
8 min read
American ExpressAmexdisputesreason codes
American Express Disputes Reference Guide
American Express handles disputes differently from Visa and Mastercard because Amex operates as both the card network and the issuer for many of its cards. This guide covers how Amex disputes work and what you need to know.
How Amex Disputes Differ
Unlike Visa and Mastercard (which are four-party systems), American Express is often a three-party system:
- Cardholder ↔ American Express ↔ Merchant
This means Amex has more direct control over dispute outcomes.
Key Amex Reason Codes
| Code | Category | Description |
|---|---|---|
| C02 | Credit/Debit | Credit not processed |
| C08 | Goods/Services | Goods/services not received |
| C31 | Goods/Services | Goods/services not as described |
| F29 | Fraud | Card member fraud claim |
| P08 | Processing Error | Duplicate charge |
Important Timelines
- Cardholder to Amex: Must report within 120 days of the statement date
- Merchant response: Typically 20 days to provide evidence
- Amex may resolve disputes faster due to their direct merchant relationships
Tips for Amex Disputes
- Be specific — Amex values clear, concise dispute descriptions
- Provide documentation early — upload evidence when you first file
- Use the Amex app or website — their online dispute process is streamlined
- Follow up — Amex disputes can sometimes stall; check status regularly