Despite all the studies and technical tests available, forgeries will still be made. The 20th-century art forger is far better equipped and much more knowledgeable than his predecessor. The demand for rare works of art has increased, and he will attempt to supply them. In collecting, whether by the private collector or by a museum, there comes a point when, after all the studies and all the tests are conducted, a decision has to be made as to whether or not to purchase a piece in question. The element of risk can be minimized but not eliminated. At this point, the collector should be ready to back his opinion with the purchase price. In order to acquire great pieces, particularly from newly discovered and relatively unknown cultures, it is necessary to take a calculated chance. The collector who has never bought a forgery probably has never bought a great piece of art.
Bob Keerseweer won an art auction on eBay by bidding $135,805 for a Diebenhorn painting. What Bob didn't know was that Rob Walton, the owner of the work, was part of a ring specializing in driving up the price of the auction. The ring posted 50 bids on the same auction that Keerseweer won. Bob also didn't know that the work was a forgery. Walton and his gang were eventually arrested and convicted (Silicon Valley Staff, 2001).
Any given antiquity may have both a provenience (where it was found) and a provenance (where it has been since it was found). A summary of the distinction is that "provenience is a fixed point, while provenance can be considered an itinerary that an object follows as it moves from hand to hand." Another metaphor is that provenience is an artifact's "birthplace", while provenance is its "résumé", though this is imprecise (many artifacts originated as trade goods created in one region but were used and finally deposited in another).
In the early 2000s, Brazilian financier Edmar Cid Ferreira had embezzled funds from his business empire — and he needed a way to hide the money. He found it in Hannibal, a painting by American artist Jean-Michel Basquiat. Appraised by the art world at $8 million, Ferreira showed up at New York’s Kennedy Airport in 2007 with the painting and a bill of lading listing the value as $100.
In an effort to make this information more publicly accessible, this list can be found here and and is regularly updated as the Museum’s research progresses. This list is also published on AAM’s Nazi-Era Provenance Internet Portal (NEPIP), a central searchable registry of objects in U.S. museums that were created before 1946 and that possibly changed hands in continental Europe between 1933 and 1945, which was last updated in 2017.
American art forger Ken Perenyi published a memoir in 2012 in which he detailed decades of his activities creating thousands of authentic-looking replicas of masters such as James Buttersworth, Martin Johnson Heade, and Charles Bird King, and selling the forgeries to famous auction houses such as Christie's and Sotheby's and wealthy private collectors.
Jack Flam took his information to the FBI's Art Crimes unit, which launched an investigation. In 2013, Glafira Rosales confessed to playing a key role in the multimillion dollar fraud. She is now awaiting sentencing, and told the FBI the forgeries were the handiwork of this man: Pei-Shen Qian, an artist who lived in Queens and painted the works in his garage.
Despite those advances, the detection of fraudulent art remains a complex undertaking. It is particularly difficult to weed out forgeries in the work of modern artists whose large numbers of works and superstar statuses make them especially attractive to those who commit fraud. Pablo Picasso, for example, was a prolific artist, creating a huge number of works on canvas and on paper as well as sculptures and ceramics. Considering his vast output and the varying styles and media in which he worked, scholars have had difficulty establishing a definitive corpus for him. The prestige associated with owning a Picasso and the difficulty of attribution, especially for a drawing, made and continues to make fraudulent representations of his work hard to police.