> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v23** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/MutateBillingSetupRequest).

Request message for billing setup mutate operations.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v23/services/billing_setup_service.proto)

| Fields ||
|---|---|
| ## `customer_id` | `string` Required. Id of the customer to apply the billing setup mutate operation to. |
| ## `operation` | `BillingSetupOperation` Required. The operation to perform. |