unlimited/processing
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Decline code · 91

Decline code 91: Issuer Unavailable

The card's bank could not be reached at that moment.

unlimitedprocessing.com · decline check
ISO 91
Issuer Unavailable
Temporary (soft)
Save on another gateway?
To be confirmed by the Unlimited team
What to do now
  • A retry a few moments later often works, as it's a temporary outage.
The same decline elsewhere
Stripeissuer_not_available
NMI421 · Communication error with issuer
Adyen9 · Issuer Unavailable
Authorize.netnot verified yet

Whether a cascade helps here depends on Unlimited’s routing rules, which the team is confirming.

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Soft declines move on. Fraud and stolen cards never do. At most 10 declines per card every 24 hours.
← Check any decline code
Source: official card-network / ISO 8583 response codes and each processor’s documentation. Routing rules: Unlimited Processing. Updated 2026-11-09.