You are legally required to not lie, but if you are not asked...

There is no doubt in my mind that immigration have access to employment records, but that does not mean they access them on every occasion.
CBSA officers often call employers to verify work permits.
Hi
Thanks for that but how would they know? Usually we just give over our passports with his visa inside and explain I am on my husbands as per the note in my passport and written on his permit.
What I really want to know is would his employer inform Immigration he no longer was employed by them? is it something they legally are required to do?
Hope someone can advise
They would know if the employer advised CIC that he was no longer working for them. And if they called the employer when he enters Canada if they want to verify that he is still working for them. It's up to the CBSA officer.