Welcome to the Developer Forum @shinseikaikanoffice! Can you share more details regarding your workflow and what you are looking to accomplish? While we don’t have registration a dedicated field for paid registrants that is reported on, there are alternatives you can consider. For example, perhaps you can repurpose a webinar status to signify paid or not. Then place the webinar registration behind a paywall. By doing this anyone who registers can fall under the paid classification.