Mark event registrants Attended or Not Attended

Add functionality which allows you to mark registrants as attended / not attended / partially attended.
E.g a event may be over 2 days = 10 hours but someone only attends 1 day so they are marked as "Partially attended" and the event hours on their record shows 5 hours.
When they are marked "Attended" their record shows 10 hours
When they are marked "Not attended" their record shows 0 hours
The registrants attendance record would show in their CB profile and they could print out a pdf certificate of attendance.

I think this is a great feature idea.

Considering some of my clients events are over 3 days... even if just marked "Attended" or "Did not attend", that would be great.

Like it is done on the actual registrants backend - top row has from First Name to ID They are exporting the registrants themselves and could in effect just mark them in on the backend of the site as they enter the doors.

Perhaps even an auto-responder feature when its clicked on as attended - "thank you for attending the [event_name]"