# VoucherifySdk::ClientEventsCreateRequestBodyReferral ## Properties | Name | Type | Description | Notes | | ---- | ---- | ----------- | ----- | | **code** | **String** | A code through which a new visitor has been referred to a service. | | | **referrer_id** | **String** | Unique ID of the referring person - it is optional and not required if the referral **code** is provided. | [optional] |