# UltracartClient::OrderMarketing ## Properties | Name | Type | Description | Notes | | ---- | ---- | ----------- | ----- | | **advertising_source** | **String** | Advertising source | [optional] | | **mailing_list** | **Boolean** | True if the customer has opted into mailing list subscription | [optional] | | **referral_code** | **String** | Referral code | [optional] | ## Example ```ruby require 'ultracart_api' instance = UltracartClient::OrderMarketing.new( advertising_source: null, mailing_list: null, referral_code: null ) ```