- set the participant role to "Attendee"
- set participant status to "Attended"
- set the source field to "Walk-up ticket sale"
- insert the cardholder name into the contact field
I've been testing this custom template with this URL path:
Appending the "eid" param loads the form with a specific event already selected.
With the custom template and the mode and eid params appended to the URL, I am getting pretty close to a decent live POS screen for credit card payments.