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People keep trying to make fake, or counterfeit, money. It’s been going on for a long time.
Back when the Aztecs ruled Mexico, cacao beans were used as currency. Cacao is used to make chocolate. Criminals would empty a cacao bean’s shell and fill it with mud. Counterfeiters, or people who make fake currency, cause real problems, because counterfeiting can make people lose faith in money. Is this $100 bill real or fake, they wonder. Governments have many ways to try to stop counterfeiting, including expensive machines, paper, ink, and metals. All that effort has turned money into small works of art, full of details that are hard to copy.
