WebCollect treats everyone who is associated with your organisation as a member. That will include people who have purchased tickets for an event.
You can identify who the non-members are by:
- Going to the members' list page (Click on Members in the Membership Summary section in Admin Home)
- Click on Show Filters in the Filter by Subscriptions section
- Select "not covered by current", keeping all of the subscriptions ticked (or the relevant ones)
- Click on the Filter Button