The superdollar, or superbill, refers to a very high quality counterfeit United States $100 bill that has been circulating around the world. After investigations by the United States, Great Britain, China and other world powers, certain crime syndicates and federal governments have been suspected and implemented in creating the notes. The U.S. Government believes that the counterfeit one hundred-dollar bills are most likely being produced in North Korea. However, other possible sources include Iran or criminal gangs operating out of China. Some have even suggested the possibility of an American CIA involvement.

It has been determined that high ranking government officials or organized crime organizations are responsible for the notes because they are extremely high quality and practically intractable. In fact, they are called superdollars because the technology used to create the counterfeit bills is more advanced and superior to the original. The notes are said to be made with the highest quality ink and paper. They are designed to recreate the various security features of United States currency, such as the red and blue security fibers, the security thread, and the watermark. The notes are printed using the intaglio and typographic printing processes.

The United States has based its accusations against North Korea on the accounts of North Korean defectors, who allegedly described the operation, and on South Korean intelligence sources. Certain witnesses have claimed that the factory where the notes are printed is located in the city of Pyongsong, North Korea, and is part of Division 39. The United States government has suggested that the superbills are being distributed by North Korean diplomats and international crime syndicates. In 2004, The U.S. prohibited Americans from banking with Banco Delta Asia. Since that time, the United States has regularly threatened North Korea with sanctions over its alleged involvement with the counterfeit operation.

On February 2, 2006, banks in Japan voluntarily enforced sanctions on Banco Delta Asia identical to those imposed by the U.S. Some have estimated that 1 in 10,000 US$100 bills are counterfeit. The American $100 bill is the most counterfeited currency in the world. To fight the abuse, the U.S. government has developed a new $100 bill that is more secure. The new design has a complex printing process and holds a new 3D blue security stripe. The bills were initially set to be released in early 2011, but the U.S. Treasury and Federal Reserve suffered a major setback when 1.1 billion new one hundred-dollar bills were printed with a flaw. The release of the new $100 bill has been pushed back until the printing problem can be fixed.
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http://listverse.com/2011/01/10/10-questions-to-make-you-think/