I found this interesting: On my return from YEG tonight to T2/YYZ, after retrieving my bag from the carousel -- this time my priority bag did come down among the first four -- and heading for the exit, I came on two security guards who were checking baggage tag numbers with the receipt portion. This had been done at many US airports in the past -- and at YVR for a while in the 80s -- but pretty much disappeared of late. This is the first time I have seen it at YYZ. So just remember not to put your ticket envelope too far out of reach.