# gateway.transaction_processing.charge_invalid_parameter

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


**gateway**

The payment failed because one or more parameters in the payment request are invalid. This can include incorrect card information, missing or malformed billing details, or unsupported payment method parameters.

## Recommended Customer Message

Your payment cannot be processed due to invalid payment details. Try again with the correct details.

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

-   **Incorrect card information:** The card number, expiration date, or CVV is invalid.
-   **Invalid billing information:** Required fields like billing address, postal code, or country are missing or incorrectly formatted.
-   **Unsupported payment method parameters:** Parameters provided do not match the gateway's expected formats or supported payment methods.
-   **Incorrect API payload:** Your system sent an invalid request to the payment gateway.

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

-   Inform the customer that their payment failed due to invalid payment details.
-   Ask the customer to verify and re-enter their payment information carefully.
-   Ask the customer to ensure all required fields, such as card number, CVV, expiration date, and billing address, are correct and valid.
-   If the issue persists, recommend trying an alternative payment method.
-   Refer to your gateway documentation to identify the specific invalid parameter.
-   Ensure that the transaction payload sent to the gateway matches the expected formats to avoid repeated failures.