They had similar usages like their US counterparts. You will see these a lot on documents to show proof of payment of taxes and other different fees.
There is a set of books out on the different revenue stamps of Canada. It is not the standard Van Dam revenue catalogue but a set published by Zaluski. The books showed just how these stamp were applied and why. Unfortunately, I do not have that set of books - pretty dicey $$-wise

Chimo
Bujutsu