What Is Error Code 91
Error code 91 is called "Issuer or Switch Inoperative." In practice, it means the payment network (Visa or Mastercard) attempted to reach your issuing bank to authorize the transaction but did not receive a response within the required timeframe.
Your card and your money are fine. The problem is that your bank's server is currently unavailable or responding with significant delays.
This is a temporary situation — one of the few card errors that is very likely to resolve itself on its own.
Why Error 91 Occurs
Planned bank maintenance. Banks periodically perform scheduled maintenance during which their processing center is temporarily offline. This usually happens at night or on weekends, but sometimes during business hours.
Unplanned outage. The bank's transaction processing server may go down due to technical issues: overload, hardware failure, or network problems. This is an unplanned situation the bank works to resolve as quickly as possible.
Issues in interbank communication channels. A payment request travels through multiple nodes: terminal → acquirer → payment network → issuer. A failure can occur at any intermediate point.
International transactions. Cross-border payments add more potential failure points. If the communication channel between your bank and the international payment network is unstable, error 91 is more likely.
Limited processing hours. Some regional banks operate their processing center on limited hours (not 24/7). Attempting a payment outside that window will produce error 91.
What to Do
1. Wait 5–15 minutes and try again. In most cases, error 91 is short-lived. If the bank was running maintenance, it will likely be done within a few minutes.
2. Check your bank's status. Open the mobile app: if it's down or showing errors, that confirms the problem is on the bank's side. Check the bank's website or social media — banks often post outage notifications.
3. Use a different card. If payment is urgent and your bank is unavailable, use a card from a different bank. Marix virtual cards operate independently of the status of any particular issuing bank.
4. Contact your bank. If error 91 persists for several hours, call support. The bank can confirm the outage status and give an estimated recovery time.
5. Don't worry about your money. With error 91, the transaction is not completed — no funds are debited. If funds were debited but no confirmation arrived, contact your bank immediately.
Frequently Asked Questions
How long does an error 91 outage typically last? Most technical outages are resolved within 15–60 minutes. Scheduled maintenance at major banks usually lasts 1–4 hours, typically overnight.
Can money be debited when error 91 occurs? No. Error 91 means authorization failed — the transaction is not complete. Occasionally a temporary hold may appear, which releases automatically within 1–3 days.
Why does error 91 happen more often at night? Nighttime is when banks typically schedule planned maintenance — software updates, backups, and server upkeep.
Need a card that works independently of your bank's technical issues? Marix — virtual cards for reliable international payments.