100 Canadian dollars picture . Many shops, mainly small ones, in Canada will not accept 100 $ bill out of fear that might be fake one.
Here is picture of 100 Canadian dollar note under fluorescent light. This is how real note should look.

New Canadian 20 $ note.

Here is twenty Canadian dollars note. Just like with ten dollar note if leafs and number twenty on "silver" stripe on left side od the note are not changing colors when looking at it from different angles than note is fake.
And here is same side of twenty dollars but under fluorescent light. Quite interesting.