The U.S.-dollar forgeries designated "Supernotes," which are so good that even specialists are unable to distinguish them from genuine notes, have circulated for almost two decades without a reliable identification of the culprits. Because of their extraordinary quality, experts assume that some country must be behind the enterprise.
“Sources allege that the CIA prints the falsified 'Supernotes' at a secret facility near Washington to fund covert operations without Congressional oversight.”
http://www.globalresearch.ca/index.php?context=viewArticle&code=BEN20070109&articleId=4393