Issuer or Switch Inoperative
This decline means the card issuer's system, or the network switch routing the transaction to it, was temporarily unreachable or down when the authorization request was sent. It is not a reflection of the cardholder's account status and typically resolves once the issuer's systems come back online.
Decline code by card network
| Card network | Code | Network's wording |
|---|---|---|
| Visa | 91 | Issuer or Switch Inoperative |
| Mastercard | 91 | Issuer or Switch Inoperative |
Common causes
- The issuing bank's authorization system is experiencing an outage or scheduled maintenance window.
- A network switch or intermediary routing node between the acquirer and issuer is temporarily down.
- Regional connectivity issues are preventing the authorization request from reaching the issuer in time.
What merchants should do
- Ask the customer to wait a few minutes and retry the transaction, since these outages are usually short-lived.
- Offer an alternative payment method if the issue persists, rather than repeatedly resubmitting the same card.
- Check your payment processor's status page or contact support if this decline spikes across many different cards at once.
How to prevent this
- Monitor decline code distributions so a sudden spike in "91" declines is flagged as a potential issuer or network outage rather than mistaken for a fraud or funding problem.
- Configure smart routing or retry logic with your acquirer to automatically re-attempt authorization through an alternate path after a brief delay.
- Communicate clearly at checkout that the issue is temporary and technical, reducing cart abandonment and support tickets.
Because this decline originates outside the cardholder’s control, merchants should avoid treating it as a risk signal; if it affects a large share of transactions simultaneously, it is worth checking whether a specific issuer or regional switch is experiencing a broader outage.
Frequently asked questions
Does an "Issuer or Switch Inoperative" decline mean something is wrong with the customer's card?
No. This decline indicates a temporary system outage on the issuer's or network's side, not a problem with the cardholder's account, balance, or card status.
Should the merchant retry the transaction immediately?
A single retry after a short delay is usually reasonable, since these outages tend to be brief. Repeated immediate retries are unlikely to succeed if the underlying system is still down and may be better spaced a few minutes apart.