Reason code

American Express reason code 176 is used when a cardholder disputes a charge that was made without the physical card being present and claims they don’t recognize the transaction. This is common in online, phone, or app-based purchases where additional verification is essential.

These disputes often result from billing confusion, forgotten subscriptions, or unauthorized use of stored card credentials. Merchants who can show the cardholder authorized the transaction—even without a physical card—can often successfully challenge the chargeback.

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If the charge was legitimate and authorized, provide digital proof linking the cardholder to the transaction:

• Submit IP address logs, email confirmations, or account activity tied to the customer
  
  
• Include AVS/CVV match results and shipping or usage records if applicable

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Strengthen your verification process for card-not-present transactions:

• Use tools like 3D Secure, AVS, CVV, and device fingerprinting

• Clearly confirm purchases via email and provide recognizable billing descriptors