North Korea is one of the largest counterfeiters of US$50 and US$100 bills!
Cut it out Kim Jong-un. North Korea’s counterfeit U.S. $50 and $100 bills have been nicknamed "superdollars," as they are so close to the real thing that they've been referred to as "just U.S dollars not made by the U.S. government."
The U.S. government is none too pleased with the awesomely counterfeited bills and are currently in talks with the North Korean government to get them to knock it off.
Jong-un might get a little tickled by ruffling the feathers of the U.S. government and might just amp up his production of the fake $50s and $100s.
The fakes are so good that pretty much only the Federal Reserve is equipped with the necessary equipment to detect them. Those are some really high quality counterfeits!