To do this, follow these steps:
  1. Click Edit next to your Event
  2. Proceed to step 6, Configure Ticket Types
  3. Click Add Type
  4. Leave Price at $0.00
  5. From the Security Category dropdown, select Administrators Only
  6. Finish configuring the ticket class
  7. Return to the Event List and Manage your Event
  8. Click Add Event Attendee
  9. Search for a preexisting constituent or create a new attendee
  10. Select a quantity of 1 or more for the new ticket class
As the Payment Method disclaimer states, "Note: If the monetary value is equal to zero or none exists, the selected payment method will be ignored." Once you click Finish, the constituent will be registered without a fee.