The US Treasury announced Congressional testimony that it was still investigating counterfeit dollars known as “Supernotes” believed to originate from North Korea.

From Reuters:

Turning to North Korea, Levey said the U.S. Secret Service was continuing to investigate counterfeiting activities by Pyongyang. He said high-quality counterfeit $100 bills produced by North Kora, known as the “Supernote”, were continuing to surface.

The counterfeit bills were among deceptive North Korean financial activities that led the Treasury in 2005 to blacklist Banco Delta Asia, a small bank in Macau, cutting off North Korea from the international financial system. The move stalled multilateral talks aimed at halting North Korea’s nuclear weapons program.

North Korea is estimated to earn about $20 million from the sale of counterfeit dollars.