* If the seller states that the work of art sold at an auction house, have them provide the name and contact information for the auction house as well as the date of the sale and lot number of the art in that sale. Just because an auction house sells a work of art does not automatically make that work of art genuine. Best procedure here is to get a copy of the auction catalog and carefully read the listing for the art.
A peculiar case was that of the artist Han van Meegeren who became famous by creating "the finest Vermeer ever" 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".
In March 2001 in Boston, meeting with an undercover agent posing as a drug dealer who showed interest in buying the putative Raphael, Stewart said he could move cash, exchange cash for gems in addition to art, and handle the resale of the Raphael, the agent's affidavit says. Eventually, the deal shifted to the Modigliani and Degas, the affidavit says, and Stewart fell out of the transaction.
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.
If a painting has been in private hands for an extended period and on display in a stately home, it may be recorded in an inventory – for example, the Lumley inventory. The painting may also have been noticed by a visitor who subsequently wrote about it. It may have been mentioned in a will or a diary. Where the painting has been bought from a dealer, or changed hands in a private transaction, there may be a bill of sale or sales receipt that provides evidence of provenance. Where the artist is known, there may be a catalogue raisonné listing all the artist's known works and their location at the time of writing. A database of catalogues raisonnés is available at the International Foundation for Art Research. Historic photos of the painting may be discussed and illustrated in a more general work on the artist, period or genre. Similarly, a photograph of a painting may show inscriptions (or a signature) that subsequently became lost as a result of overzealous restoration. Conversely, a photograph may show that an inscription was not visible at an earlier date. One of the disputed aspects of the "Rice" portrait of Jane Austen concerns apparent inscriptions identifying artist and sitter.
Glafira Rosales, an obscure Long Island art dealer, her boyfriend, and his brother enlisted Pei-Shen Qian, a Chinese artist in Queens, to paint Abstract Expressionist canvases in the style of such masters as Jackson Pollock, Mark Rothko, Robert Motherwell, and others. The venerable Knoedler gallery, which closed in 2011 as the forgeries came to light, still claims they believed Rosales’s story that the works were part of an undocumented collection sold directly by the artists to an anonymous “Mr. X.”
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.