1994 Russia (10000 MMM Biletov, Face)

This note has an interesting story -- it's not a banknote, it's a fractional share of one of the largest pyramid schemes ever. After the Soviet Union collapsed, the MMM (Mavrodi) corporation started up and sold company shares to the public, promising a huge interest pay off. They financed the interest by selling more shares. When the system collapsed, estimates say over two million people were scammed, with more than a billion dollars rolled into the scheme. Wow.