Counterfeit United States currency

Article I, Section 8 of the U.S. Constitution gives Congress the power to "provide for the Punishment of counterfeiting the Securities and current Coin of the United States".

[7] During World War II, Nazi Germany successfully produced high-quality counterfeits of American dollar and Bank of England pound notes, although few ever were circulated thoroughly.

The Congressional Research Service has conducted a study and concluded with an accusation that North Korea was responsible for their production, but Pyongyang denied any involvement with Superdollar.

In each of these schemes, fraudulent instruments are claimed to be part of a long-lost supply of recently discovered Federal Reserve notes or bonds.

Fraudsters often falsely claim that the purported Federal Reserve notes or bonds that they hold are somehow very special and are not known to the public because they are so secret.

In March 2006, agents from ICE and the Secret Service seized 250 notes, each bearing a denomination of $1,000,000,000 (one billion dollars) from a West Hollywood apartment.

In the United States, counterfeiters in small operations develop the fake currency using tools which often include printers, an iron, and green colored water.

"To Counterfeit is Death" - counterfeit warning printed on the reverse of a 4 shilling Colonial currency in 1776 from Delaware Colony
American 18th–19th century iron counterfeit coin mold for making fake Spanish milled dollars and U.S. half dollars
Anti-counterfeiting features on a series 1993 U.S. $20 bill
The security strip of a U.S. $20 bill glows under black light as a safeguard against counterfeiting
Counterfeit 100 dollar bill, series of 1974 but probably made later. Over-stamped with "Contrefaçon" on both sides. On display at the British Museum, London