# gateway.transaction_processing.invalid_level3_data

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


**gateway**

The payment failed because the Level III data required for the transaction is missing, incomplete, or incorrectly formatted. Level III data includes detailed line-item information required by certain payment processors for B2B or government card transactions.

## Recommended Customer Message

There was an issue with the payment information provided. Please review and update your details or contact your payment provider for assistance.

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

-   **Missing Level III data:** Required fields such as item descriptions, quantities, or tax amounts were not submitted.
-   **Incorrect or invalid data:** Incorrect formatting or values in the Level III fields.
-   **Gateway requirements:** Specific payment processors mandate Level III data for certain transaction types (e.g., B2B or government cards).
-   **Incomplete integrations:** The system did not pass all mandatory Level III fields during the transaction request.

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

-   Review the payment payload and verify that all mandatory Level III data fields are correctly populated.
-   Ensure accurate formatting of line-item details like item names, quantities, unit costs, tax rates, and shipping details.
-   Consult the gateway's Level III data documentation for the required field formats and completeness.
-   Retry the transaction after ensuring that all necessary Level III information is accurately provided.
-   Contact Chargebee Support if the problem persists despite correct inputs.