It is preferred that you enter all names and email addresses of attendees in your group at the time of registration, but it is not required. 

If you do not have the names of all parties in your group when registering, the online system will add an open registration for each unknown guest corresponding to the number of tickets purchased. You will need to add guest names and unique email addresses prior to the event. 

Lastly, guest names are required at the point of registration for any guest attending on a discounted Emerging Leader, Student, Faculty or Active Military ticket.