You may do attendee substitution on any registration, paid or unpaid, in an open meeting.
To do this in the classic registration flow on the staff Intranet side:
– Find the registration you want to change/edit
– Link to ‘edit registration’ either from the pencil icon or an edit link, depending where/how you are viewing the registration
– Scroll down on that first page, past name, badge info, etc. to the Attendee Substitution box. Do a ‘find’ to find the person you want to substitute in, or add a new person from here too
– Save page
Currently the flow to do this is similar for group registration, but may change in the future to be more like WWW.