How to set up attendee self-service registration/event transfers
If you’re using Eventbrite Payment Processing for a paid, public event, you can allow attendees to transfer to a different ticket type or event on their own. To set this up, head over to your event’s Manage page and look to the Order Options section. As long as you’re collecting information from each attendee, you’ll see the “Registration Transfers” option available.
More information: https://www.eventbrite.com/support/articles/en_US/How_To/how-to-set-up-attendee-self-service-registration-event-transfers?lg=en_US