Any art object—paintings, sculpture, jewelry, ceramics, fine furniture, and decorative pieces of all kinds—can be forged. The difficulty of forging, however, is as important as market price in determining what is forged. Probably fewer than 1 percent of stone sculptures are false because they require so much labour to make and their market is limited, but as many as 10 percent of modern French paintings on the market may be forgeries. The technical difficulties in making a convincing imitation of an ancient Greek vase are so great that forgeries are almost nonexistent. In contrast the forgery level of tiny archaic Greek and Cretan bronze statuettes, which are simple to cast, is possibly as high as 50 percent. A forger is most likely to succeed with a mediocre piece in the middle price range because such a piece probably will never be subjected to definitive examination. Although the price should be low enough to allay suspicion, the object can still yield a fair return for the effort expended by the forger.

Where the research is proceeding backwards, to discover the previous provenance of a painting whose current ownership and location is known, it is important to record the physical details of the painting – style, subject, signature, materials, dimensions, frame, etc.[7] The titles of paintings and the attribution to a particular artist may change over time. The size of the work and its description can be used to identify earlier references to the painting. The back of a painting can contain significant provenance information. There may be exhibition marks, dealer stamps, gallery labels and other indications of previous ownership. There may also be shipping labels. In the BBC TV programme Fake or Fortune? the provenance of the painting Bords de la Seine à Argenteuil was investigated using a gallery sticker and shipping label on the back. Early provenance can sometimes be indicated by a cartellino (a representation of an inscribed label) added to the front of a painting.[8] However, these can be forged, or can fade or be painted over.
In archaeology and paleontology, the derived term provenience is used with a related but very particular meaning, to refer to the location (in modern research, recorded precisely in three dimensions) where an artifact or other ancient item was found.[3] Provenance covers an object's complete documented history. An artifact may thus have both a provenience and a provenance.
A peculiar case was that of the artist Han van Meegeren who became famous by creating "the finest Vermeer ever"[7] and exposing that feat eight years later in 1945. His own work became valuable as well, which in turn attracted other forgers. One of these forgers was his son Jacques van Meegeren who was in the unique position to write certificates stating that a particular piece of art that he was offering "was created by his father, Han van Meegeren".[8]
“There are museums in the past who have wanted to take something of high value down and replace it with a replica, but that’s a behind-the-curtain thing,” says Timothy Carpenter, a supervisor and special agent in the FBI’s art theft program who frequently lectures collectors to do the same. “If you’ve got this $10 million painting that you’re concerned about, you can probably afford to make a $5,000 copy made and hang it. It’s the only guarantee to keep their painting safe if they don’t have security on their residence.”
One of the more-complicated examples is that of the Getty kouros, an allegedly 6th-century-bce male sculpted figure owned by the J. Paul Getty Museum in Los Angeles that has long been suspected of being a modern forgery. The Getty paid a very high price for what it believed may have been the last remaining such figure on the art market only to find that the sculpture had stylistic irregularities that suggested that it could not be authentic. At the same time, scientific tests have not demonstrated that it is of modern origin, and some scholars have argued that stylistic anomalies do not prove that it is a fake. The Getty Villa exhibited the work in its galleries with a label that read: “about 530 bc or modern forgery.” However, the kouros was removed from view when the museum completed a yearlong renovation in 2018, with the director stating that the sculpture was fake.
At times restoration of a piece is so extensive that the original is essentially replaced when new materials are used to supplement older ones. An art restorer may also add or remove details on a painting, in an attempt to make the painting more saleable on the contemporary art market. This, however, is not a modern phenomenon - historical painters often "retouched" other artist's works by repainting some of the background or details.

I'll make a confession right off the bat: I didn't give The Art Forger 4 stars because I was blown away by the prose, scene, setting, or characterization. Had those been up to snuff I'd have given it an easy 5. There are some flat characters, relies somewhat on stereo typical thinking about artists and their studios, it sports some letters written by someone else in stand alone chapters which jar a bit with the first person view point (one would assume our heroine would have no knowledge of thes ...more
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In the last decade, reported revenues from the Chinese auction market have expanded ninefold, now higher than those of its American counterpart. Records have been set for Chinese masters that compete with the West’s already inflated prices for Warhol and Picasso — if such records even end up holding, given some buyers who are refusing to pay because of doubts about authenticity.

Eli Sakhia was a respectable art gallery owner in business for 15 years in Manhattan. He sold privately and to auction houses in the United States and abroad. What he failed to tell his private buyers was that they were buying the forgeries and the auction houses were getting the real works. His modus operandi was to purchase originals, sell them to auction houses, and hire artists in the interim to reproduce fakes for sale to his clients. His problems started when a past buyer of a fake tried to sell his forged piece while Sakhia attempted to sell the original to another auction house. The houses brought in an expert who stated that the past buyer's work was a fake. Sakhia was arrested and convicted; he's expected to serve three to four years in prison (Campanile, 2004).
Regardless of whether this provision ultimately is enacted, the underlying issue will persist.  This post discusses some of the general concerns that the art and antiquities world can be misused as a conduit for dirty money.  We then discuss the AML Standards for Art Market Operators proposed by the Basel Institute on Governance, and similar standards set forth by the Responsible Art Market, both of which attempt to set forth a framework for those in the business of trading art to mitigate their money laundering risks.
Forgeries again came into play at Turkey’s State Art and Sculpture Museum in Ankara, where a group of museum officials and criminals are believed to have teamed up to steal some 302 works from the institution between 2005 and 2009. The crime was discovered in 2012, when the museum realized that 46 pieces in the collection had been replaced by copies. Another 30 works also raised suspicion.
In the 18th and 19th centuries, the mania for classification and study of the past resulted in an upsurge in forgeries as the art market adjusted to accommodate the new interest in the artistic past. That interest in the classification of the past also led to the founding of academic disciplines such as the history of art. The study of art history and the creation of agreed-upon bodies of work for artists and eras, as well as advances in science, made possible in the 20th century the winnowing out of forgeries, fakes, and misattributions from authentic works. As art historians gained more knowledge about the past and the styles, materials, and working conditions of artists and historical epochs, inauthentic and fraudulent works were more readily exposed.