At the venue.
In the auditorium where the award ceremony was held.
The guests and nominees were gradually admitted inside.
"Hello, please produce your invitation."
"Here."
"OK, thank you."
"Hello, may I have your invitation card please?"
"Is it this one?"
"Yes, you may enter."
Security checks.
Producing invitations.
Verifying identities.
Running facial recognition.
1. https://en.wikipedia.org/wiki/Doctor_of_Medicine