Originally Posted by
Global321
I did not know this is a thing.
I have done it several times in the international baggage hall, before clearing customs. Typically I was adding things to the bag that I would not need on my domestic flights. No one gave me a look. And there were agents (and dogs) wandering around.
I have also seen plenty of others do it. I never gave it a second thought. I do not think anyone cares.
I think that you are right and it's not an issue since passengers are really only clearing customs at the time that they give the form to the agents located at the exit. And for them, it does not make a difference if the things that need to be declared for the taxes or things that are illegal are in the checked luggage, the cabin luggage or on/in the passenger.