Amex F29 quick reference: American Express fraud code for card-not-present transactions where the cardholder claims non-participation. Merchant has 20 days to respond.
Cardholder's claim
"I didn't authorize this charge and I wasn't present."
Amex F29 is Amex's CNP fraud equivalent to Visa 10.4 / MC 4837. Amex evidence rules are slightly stricter — they weight enrolled 3DS (SafeKey) higher and are more skeptical of AVS-only defenses. Amex also has its own Fraud Full Recourse Program (FR2) and Immediate Chargeback Program (FR4) that adjust dispute mechanics.
Response deadline
20 days to submit representment. From the chargeback date — tighter than Visa/Mastercard.
Common triggers
- True fraud on a compromised card
- Friendly fraud on family accounts
- Card-testing patterns
Required evidence
SafeKey / 3DS authentication
Amex SafeKey enrollment + successful challenge.
AVS + CID match
Full match at auth.
IP + device fingerprint
Matched to prior successful sessions.
Delivery to AVS address
Carrier tracking to the AVS billing address.
Typical win rates
| Scenario | Win rate | Notes |
|---|---|---|
| SafeKey-authenticated | 85–92% | Strongest defense |
| AVS + delivery proof (no SafeKey) | 30–50% | Amex stricter than Visa/MC |
Win rates reflect Aurai's own book across Stripe, PayPal, and Shopify Payments as of July 2026, plus public MRC Global Fraud Survey 2024 baselines. Your results will vary.
Related reason codes
10.4Visa
Other Fraud — Card-Absent Environment
Cardholder claims they didn't participate in the transaction and the merchant was not in a card-present environment. The single most common fraud code in ecommerce.
4837Mastercard
No Cardholder Authorization
Mastercard's equivalent of Visa 10.4 — cardholder claims they didn't authorize the transaction in a card-not-present environment.
UA02Discover
Fraud — Card Not Present
Discover's CNP fraud code — cardholder claims non-participation in a card-not-present transaction.
Frequently asked questions
What does Amex F29 mean?
Amex F29 is the reason code for "Card Not Present — Fraud." American Express fraud code for card-not-present transactions where the cardholder claims non-participation.
What's the response deadline for Amex F29?
Merchants have 20 days to submit representment. From the chargeback date — tighter than Visa/Mastercard.
What evidence is required to fight Amex F29?
SafeKey / 3DS authentication, AVS + CID match, IP + device fingerprint, Delivery to AVS address. Full detail in the Required evidence section above.
Can Aurai handle Amex F29 automatically?
Yes — Aurai detects the reason code, assembles the specific evidence stack for it, and submits before the deadline. 25% only on disputes we win.
Reason code details reflect the current Amex rules as of July 2026 and may change. Amex is a trademark of its respective owner. Aurai is independent and not endorsed by Amex. Always check the current official rules before acting on any specific tactic.