I flew PHL-YYZ-YVR yesterday with an overnight before YVR-YYJ this morning.

At check-in yesterday I provided the negative PCR test results and proof of full vaccination. Arriving back at the airport this morning I checked in with the concierge on whether I needed to provide the proof of vaccination again and was told yes. No big deal I show it and she said she needed print my new boarding pass with ATTC on it and I assumed that was to show we had provided proof of vaccination. I had hoped we could expect to be done with this step.

Of course not, I needed to show the physical proof of vaccination at both at the lounge and the gate. (as TTC900Rocket mentioned)

I hope this will be streamlined over the next few days to something like passport verification. If you show it at the check-in desk you don't need to airside.

dudestir