American Express Payment Decline Code
American Express Decline Code 111: Invalid Account or Invalid MICR
Category Card or Account StatusRetry Guidance Conditional Decline (Editorial Classification)By Payment Defender Editorial TeamUpdated July 17, 2026Last reviewed July 17, 2026
What American Express Decline Code 111 Means
American Express declined the transaction because the account number or MICR data submitted was invalid or not recognized.
Where the Response May Come From
This response comes from American Express. The account number or associated data does not match a valid account.
Common Reasons for This Response
Common causes include a mistyped card number, transposed digits, or corrupted account data submitted in the request.
Should the Merchant Retry the Payment?
A retry with the same account data is unlikely to succeed; corrected details may be needed. Whether a fresh attempt works depends on the underlying account condition, so confirm with your processor rather than assuming approval.
Recommended Merchant Action
Prompt the customer to re-enter their card number carefully or provide a different card, and confirm handling with your processor if valid details continue to be declined.
What to Tell the Customer
Ask the customer to double-check the card number for typos or use another card.
How to Reduce Similar Payment Failures
Real-time card-number validation at checkout may catch entry errors before submission and reduce these declines.
Important Limitations
Decline-code meanings vary by processor, gateway, and payment environment, and American Express does not always disclose the specific reason behind a response. The retry classification on this page is Payment Defender editorial guidance, not an official network rule. Merchants should confirm handling with their processor or gateway.
Related Decline Codes
Sources and Review Information
- American Express: American Express Merchant Regulations
- PayPal Braintree: Braintree Processor Response Codes
Last reviewed July 17, 2026
Raw network-response codes are supplemental to the complete processor or gateway response. Meanings and recommended actions can vary by issuer, processor, gateway, card network, payment method, region, and merchant configuration.