All:
I was taking a close look at the $50 note and noticed that if you take a look with a magnifying glass at the curve that's on the left side of the note, that appears light lighter in colour and goes 'through' the hidden numbers maple leaf, you'll notice it's microprinting. It repeats 'Bank of Canada 50 Banque Du Canada" in a diminishing font size. Of course the same is on the 100, repeating 'Bank of Canada 100 Banque Du Canada'.
Tiny!
John