Maybe you have a free ticket that you've set up to restrict the user to only be able to view a certain number of talks. You probably don't want an attendee with this ticket to be able to go through registration a second time with the same email address and get another of the same ticket to watch more content. Follow the steps below.
- Head to Revenue > Tickets > ... > Edit Record.
- Check the box under 'Restrict to one ticket per email address'.
- Press Save when you're done editing the ticket.
You're all set.
If an attendee who already holds one of these tickets goes through registration again, they won't be able to select the same ticket again:
You can re-word what this button will say under Content > Translations > Tickets.
Attendees will still be able to go through registration and secure a different ticket type with the same email address.