Walk-in guests are part of every event. Set up a separate desk for on-the-spot registrations, separate from the regular check-in. Provide tablets where guests can quickly sign up with their name and email.
Create a walk-in ticket type in your system in advance so these guests end up in the same database. Always keep 10-15% extra capacity for unexpected guests in catering, seating and materials.
Read more in our article on registration and check-in at your event.