Maybe the oldest holiday scam in the book, fraudsters know this is the time of year when Canadians are the most generous. They pull on your heartstrings by providing you with links or submission forms to donate to a charity claiming to help the less fortunate this holiday season. According to Technology Marketing Corporation, an Internet security firm, always be wary of a charity you don't recognize by name — and even if you have heard of it, perform your due diligence. Make sure the charity you're donating to online has its registration number clearly visible, and cross-reference that charity with the Canada Revenue Agency's charity listings. If you don't find it on there, take your donation somewhere better suited.