# # CreateCustomer400ResponseAllOf ```php use Xendit\Customer\CreateCustomer400ResponseAllOf; ``` ## Properties | Name | Type | Required | Description | Examples | |------------|:-------------:|:-------------:|-------------|:-------------:| | **error_code** | **string** | | | DUPLICATE_END_CUSTOMER_ERROR | | **message** | **mixed** | | | Client reference already exist | [[Back to README]](../../README.md)