Inside Canada? Yes and It s very easy to verify the experiences.
Outside Canada? Not sure. Very difficult to verify it. Language differences. Time differences. Employment regulation differences. The best they can do is Email or international call.
One must remember that you should always be truthful and in good faith throughout the application process.
As far as I know Canadian laws and regulation are very punitive. They will accept whatever you say but once they find out that you give them false information. You ll be in big trouble