Originally Posted by
asovse1
If it's anything like what USCBP occasionally does for an ex-US flight
There's probably a person of interest on that flight that they're trying to intercept.
Did you see what equipment CBSA had on hand? Did they have a mobile fingerprint reader and maybe an iPad or so to process the (presumed) passenger they're trying to talk to?
Didn’t notice any particular equipment.
FWIW, the question asked was “are you carrying any significant quantities of cash”. It wouldn’t be crazy to connect this question to a particular industry that Switzerland is known for. However, I’ve flown YYZ-ZRH a whole bunch of times and have never experienced this, so it’s likely either someone of interest as you mentioned or just a fairly commonplace procedure at YUL.