# gateway.technical.issuer_unavailable

> For the complete machine-readable documentation index, see [llms.txt](https://apidocs.chargebee.com/llms.txt).


**gateway**

The card issuer is temporarily unavailable. This happens when the issuer's systems are down, there are network communication failures, the issuer is undergoing maintenance, or the systems are overloaded.

## Recommended Customer Message

We faced a technical issue. Please try again with the same card, or use a different card.

## Root Cause[](#root-cause)

-   **Issuer's system temporarily unavailable:** The card issuer's servers are down, preventing authorization of transactions.
-   **Network communication failure:** The payment gateway is unable to establish a connection with the issuer's systems.
-   **Issuer undergoing maintenance or updates:** Scheduled or unscheduled maintenance is affecting the issuer's transaction processing capabilities.
-   **High network traffic or system overload:** The issuer's systems are overwhelmed with requests, leading to unavailability.

## Troubleshooting and Solutions[](#troubleshooting-and-solutions)

-   Ask the customer to retry the transaction after a short wait using the same card.
-   Recommend switching to a different payment method or card if the problem persists.
-   Monitor the payment gateway's status page for updates on outages.
-   If this issue occurs frequently, contact the payment gateway support team for further investigation.