Counterfeiting
Efforts to reduce counterfeiting in recent years have sharply reduced the number of counterfeit notes in circulation. The number of counterfeit notes passed annually in Canada peaked in 2004, when 553,000 counterfeit notes were passed. Counterfeiting has decreased annually since that peak, with only 53,536 notes passed in 2010. The new polymer notes will be made of plastic, making it harder to counterfeit. There are 2 clear windows on the new notes, one smaller than the other. The smaller one is shaped like a maple leaf. If you hold the maple leaf window up to a light source (about one meter away) and put your eye on it, the denomination number of that specific bill will appear around the light source.
Read more about this topic: Banknotes Of The Canadian Dollar