I have always wondered how the CBSA know when you have left Canada after a 1/2/3 or 4 months stay, if you are given a stamp which allows you to stay 6 months.
When I visit Australia, You have a departure stamp in your passport.
Any of you who follow this site, know of the procedure in Canada for visitor departures ( register of departure date) by CBSA ?.
Just Curious !!
Some people also get a departure date, others are on Visa's, some have no departure date set, but have a six month limit.
In most peoples eyes, CBSA don't know, because they don't (apart from some cases) ask people to report when they leave.
However, there are many ways that people are tracked.
A few simple examples:
When a flight departs Canada the airline has to provide information about passengers on the flight.
That information can be used in Canada and oddly enough, if the flight passes over, or lands in the USA, that passenger list is also provided to the USA, before departure.
At the border, information is exchanged between the USA and Canada (people may not be aware that there are other countries that exchange information, UK, NZ etc
It is safe to assume, if they want to find out about you, they can.