The two dollar banknote was never popular. It has always been considered, that it brings bad luck, and every time the treasury tries to bring him back in, it ends in failure. The fear of the two-dollar bill is probably due to gamblers, who thought, that two are the devil.
they say, that by tearing off the triangular corner of the banknote, the magic number three is created, and this counteracts the misfortune brought about by two.
But when you receive a banknote with all four corners torn off, you should tear it up.
Some, however, do not use such drastic methods. They just kiss the banknote, because saliva is a very strong anti-magic agent and usually drives the devil away.
