When you need to cancel a participant's event registration, delete them from the applicable [Attendees] or [Exhibitors]>[User List]. Deleted users cannot access the event page and will not receive any emails sent via the EventHub platform. Deleting a participant also deletes their user analytics data.
See the following article for additional information: Editing and Deleting User Information
Registrants may request to cancel their registration by replying to an EventHub platform email. Replies are sent to the email address set via [Basic settings]>[Event information]>[Organizer email address].
Emails sent via the EventHub platform contain the following language in the email footer: