On January 1st 2021 many old canadian currencies will become worthless. It is extremely important that you cash all old money that is not collectible into the bank.
Visit Bank of Canada for more information
As a coin and currency collector I find it personally disturbing that Canada is behaving like a third world country and demonitizing its currency. This will only harm the ill informed and particularly seniors. When I appraise collections for families we often find piles of old currency that the family didn’t even know existed. It is going to create a very strange time in 2020 as dealers and collectors have to hope for the best on there collections.