Money forgery

U.S. federal law enforcement agency

thumb|Machine-made watermark on a 19th century letter A watermark is an identifying image or pattern in paper that appears as varying shades of light and dark when viewed by either transmitted light or reflected light. These patterns are created from variations in the thickness or density of the paper. Watermarks have historically been used on postage stamps, currency, and other official documents to discourage counterfeiting. There are two primary methods of producing watermarks in paper: the dandy roll process and the more complex cylinder mould process.

money that was created illegally

exercise by the Nazis to forge British bank notes

pattern of symbols incorporated into a number of banknote designs

alleged slush fund operated by the North Korean government

digital watermark which certain color laser printers and copiers leave on every single printed page, allowing to identify the device with which a document was printed and giving clues to the originator

Microprinting is the production of recognizable patterns or characters in a printed medium at a scale that typically requires magnification to read with the naked eye. To the unaided eye, the text may appear as a solid line. Attempts to reproduce by methods of photocopy, image scanning, or pantograph typically translate as a dotted or solid line, unless the reproduction method can identify and recreate patterns to such scale. Microprint is predominantly used as an anti-counterfeiting technique, due to its inability to be easily reproduced by widespread digital methods.

Portuguese fraudster (1896–1955)

security feature of banknotes

Printing of documents protected against counterfeiting

thumb|A fourrée denarius of [[Domitian, showing two points of breakage in the plating.]]A fourrée (also spelt without the accent, with one r, and with one e) is a coin, usually counterfeit, that is made from a base metal core that has been plated with a precious metal to look like its solid metal counterpart; the term is derived from the French word meaning "stuffed". Most fourrées were made from plated silver and gold, but were also made from alloys such as electrum.

anti-counterfeiting measure on banknotes and other official documents

United Kingdom legislation

Fake antique and modern coins

plot by Hungarian nationalists to forge French bank notes