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Forgery is the process of making, adapting, or imitating objects, statistics, or documents with the intent to deceive for the sake of altering the public perception, or to earn profit by selling the forged item. Copies, studio replicas, and reproductions are not considered forgeries, though they may later become forgeries through knowing and willful misrepresentations. Forging money or currency is more often called counterfeiting. But consumer goods may also be counterfeits if they are not manufactured or produced by the designated manufacturer or producer given on the label or flagged by the trademark symbol. When the object forged is a record or document it is often called a false document.
A forgery is essentially concerned with a produced or altered object. Where the prime concern of a forgery is less focused on the object itself – what it is worth or what it "proves" – than on a tacit statement of criticism that is revealed by the reactions the object provokes in others, then the larger process is a hoax. In a hoax, a rumor or a genuine object planted in a concocted situation, may substitute for a forged physical object.
The similar crime of fraud is the crime of deceiving another, including through the use of objects obtained through forgery. Forgery is one of the techniques of fraud, including identity theft. Forgery is one of the threats addressed by security engineering.
In the 16th century, imitators of Albrecht Dürer's style of printmaking improved the market for their own prints by signing them "AD", making them forgeries. In the 20th century the art market made forgeries highly profitable. There are widespread forgeries of especially valued artists, such as drawings originally by Pablo Picasso, Paul Klee, and Henri Matisse.
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England and Wales and Northern Ireland
A person is guilty of forgery if he makes a false instrument, with the intention that he or another shall use it to induce somebody to accept it as genuine, and by reason of so accepting it to do or not to do some act to his own or any other person’s prejudice.
"Instrument" is defined by section 8, "makes" and "false" by section 9, and "induce" and "prejudice" by section 10.
Forgery is triable either way. A person guilty of forgery is liable, on conviction on indictment, to imprisonment for a term not exceeding ten years, or, on summary conviction, to imprisonment for a term not exceeding six months, or to a fine not exceeding the statutory maximum, or to both.
For offences akin to forgery, see English criminal law#Forgery, personation, and cheating.
The Forgery of Foreign Bills Act 1803 was repealed in 2013.
Republic of Ireland
In the Republic of Ireland, forgery is an offence under section 25(1) of the Criminal Justice (Theft and Fraud Offences) Act, 2001 which provides:
A person is guilty of forgery if he or she makes a false instrument with the intention that it shall be used to induce another person to accept it as genuine and, by reason of so accepting it, to do some act, or to make some omission, to the prejudice of that person or any other person.
A person guilty of forgery is liable, on conviction on indictment, to imprisonment for a term not exceeding ten years, or to a fine, or to both.
Any offence at common law of forgery is abolished. The abolition of a common law offence of forgery does not affect proceedings for any such offence committed before its abolition.
Except as regards offences committed before the commencement of the Criminal Justice (Theft and Fraud Offences) Act, 2001 and except where the context otherwise requires, without prejudice to section 65(4)(a) of that Act, references to forgery must be construed in accordance with the provisions of that Act.
Forgery is a crime in all jurisdictions within the United States, including state and federal. Most states, including California, describe forgery as occurring when a person alters a written document "with the intent to defraud, knowing that he or she has no authority to do so."  The written document usually has to be an instrument of legal significance. Punishments for forgery vary widely. In California, forgery for an amount under $950 can result in misdemeanor charges and no jail time, while a forgery involving a loss of over $500,000 can result in three years in prison for the forgery plus a five-year "conduct enhancement" for the amount of the loss, yielding eight years in prison. In Connecticut, forgery in the Third Degree, which is a class B misdemeanor is punishable by up to 6 months in jail, a $1000 fine, and probation; forgery in the First Degree, which is a class C felony, is punishable by a maximum 10 years in prison, a fine of up to $10,000 fine, or both.
As to the effect, in the United Kingdom, of a forged signature on a bill of exchange, see section 24 of the Bills of Exchange Act 1882.
Before the invention of photography, people commonly hired painters and engravers to "re-create" an event or a scene. Artists had to imagine what to illustrate based on the information available to them about the subject. Some artists added elements to make the scene more exotic, while others removed elements out of modesty. In the 18th century, for example, Europeans were curious about what North America looked like and were ready to pay to see illustrations depicting this faraway place. Some of these artists produced prints depicting North America, despite many having never left Europe.
In popular culture
- The 1839 novel by Honoré de Balzac, Pierre Grassou, concerns an artist who lives off forgeries.
- The Orson Welles documentary F for Fake concerns both art and literary forgery. For the movie, Welles intercut footage of Elmyr de Hory, an art forger, and Clifford Irving, who wrote an "authorized" autobiography of Howard Hughes that had been revealed to be a hoax. While forgery is the ostensible subject of the film, it also concerns art, film making, storytelling and the creative process.
- The 1966 heist comedy film How to Steal a Million centers around Nicole Bonnet (Audrey Hepburn) attempting to steal a fake Cellini made by her grandfather.
- The 1972 novel by Irving Wallace, The Word concerns archaeological forgery, the finding and translation of a supposed lost gospel by James the Just, close relative of Jesus Christ, as part of a large project to be published as a new Bible that would inspire a Christian revival, but which is possibly a forged document.
- The 2002 film Catch Me If You Can, directed by Steven Spielberg, is based on the real story of Frank Abagnale, a con man who stole over $2.5 million through forgery, imposture and other frauds, which are dramatized in the film. His career in crime lasted six years from 1963 to 1969.
- The graphic art novel The Last Coiner, authored by Peter M. Kershaw, is based on the exploits of the 18th century counterfeiters, the Cragg Vale Coiners, who were sentenced to execution by hanging at Tyburn.
- Legislation.gov.uk. Digitised copy of section 1.
- The Forgery and Counterfeiting Act 1981, sections 6(1) to (3)(a)
- The Forgery and Counterfeiting Act 1981, section 13
- W J Stewart and Robert Burgess. Collins Dictionary of Law. HarperCollins Publishers. 1996. ISBN 0 00 470009 0. Pages 176 and 398.
- Stair Memorial Encyclopaedia
- Irish Statute Book. Digitised copy of section 25.
- The Criminal Justice (Theft and Fraud Offences) Act, 2001, section 25(2)
- The Criminal Justice (Theft and Fraud Offences) Act, 2001, sections 3(2) and (3)
- The Criminal Justice (Theft and Fraud Offences) Act, 2001, section 65(4)(b)
- "California Legislative Information, Penal Code section 470". Retrieved 20 July 2017.
- Brady, Katherine (November 2014). "California Prop 47 and SB 1310: Representing Immigrants" (PDF). Immigrant Legal Resource Center1. Retrieved 1 August 2017.
- Couzens, J. Richard; Bigelow, Tricia A. (May 2017). "Felony Sentencing After Realignment" (PDF). California Courts. Retrieved 1 August 2017.
- "Chapter 952 - Penal Code: Offenses". www.cga.ct.gov. Retrieved 2017-08-09.
- "Chapter 952 - Penal Code: Offenses". www.cga.ct.gov. Retrieved 2017-08-09.
- Norman-Eady, Sandra; Coppolo, George; Reinhart, Christopher (1 December 2006). "Crimes and Their Maximum Penalties". Office of Legislative Research. Connecticut General Assembly. Retrieved 9 August 2017.
- Yeazell, Ruth Bernard (2008). Art of the Everyday: Dutch Painting and the Realist Novel. Princeton University Press. p. 88. ISBN 0691127263.
- McBride, Joseph (2006). What Ever Happened to Orson Welles?: A Portrait of an Independent Career. University Press of Kentucky. pp. 245–250. ISBN 0813124107.
- Casper, Drew (2011). Hollywood Film 1963-1976: Years of Revolution and Reaction. John Wiley & Sons. p. 1972. ISBN 1405188278.
- Cawelti, John G. (1977). Adventure, Mystery, and Romance: Formula Stories as Art and Popular Culture. University of Chicago Press. p. 281. ISBN 0226098672.
- Wight, Douglas (2012). "Owning December". Leonardo DiCaprio: The Biography. John Blake Publishing Ltd. ISBN 1857829573.
- "Telling the Coiners' story". BBC North Yorkshire. 3 June 2008.
- Cohon, Robert. Discovery & Deceit: archaeology & the forger's craft Kansas: Nelson-Atkins Museum, 1996
- Muscarella, Oscar. The Lie Became Great: the forgery of Ancient Near Eastern cultures, 2000
- "Imaginary Images" in Detecting the Truth: Fakes, Forgeries and Trickery at Library and Archives Canada
- David Cycleback. 2018. “Authenticating Art and Artifacts: An Introduction to Methods and Issues”. Publisher Hamerweit Books ISBN 978-1387447459
|Wikimedia Commons has media related to Forgery.|
|Look up forgery in Wiktionary, the free dictionary.|
- Bibliographies of archaeological forgeries, art forgeries etc
- Museum security mnetwork: sources of information on art forgery; with encyclopedic links
- Fakes and Forgeries on the Trafficking Culture website, University of Glasgow
- Academic Classification of Levels of Forgery on The Authentication in Art Foundation Website
- List of Caught Art Forgers on The Authentication in Art Foundation Website