Fat Zebra incident
91 Errors Affecting AMEX Transactions Processed Via FDI XTP
Resolved after 1 day 1 hour, affecting Gateway: AMEX, on October 31, 2025.
We are currently investigating a problem with AMEX transactions receiving 91 response codes for some transaction attempts processed via FDI XTP. We are awaiting further information from our upstream provider regarding this incident. Please note, this issue is ONLY affect AMEX transactions, all other card types including Visa and Mastercard are NOT affected. Further updates will be provided as soon as they are available.
Affected components
Update timeline
- identified Oct 31, 2025, 03:27 AM UTC
We are currently investigating a problem with AMEX transactions receiving 91 response codes for some transaction attempts processed via FDI XTP. We are awaiting further information from our upstream provider regarding this incident. Please note, this issue is ONLY affect AMEX transactions, all other card types including Visa and Mastercard are NOT affected. Further updates will be provided as soon as they are available.
- resolved Nov 01, 2025, 04:32 AM UTC
This incident has been resolved.
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