Art specialists with expertise in art authentication began to surface in the art world during the late 1850s. At that time they were usually historians or museum curators, writing books about paintings, sculpture, and other art forms. Communication among the different specialties was poor, and they often made mistakes when authenticating pieces. While many books and art catalogues were published prior to 1900, many were not widely circulated, and often did not contain information about contemporary artwork. In addition, specialists prior to the 1900s lacked many of the important technological means that experts use to authenticate art today. Traditionally, a work in an artist's "catalogue raisonné" has been key to confirming the authenticity, and thus value. Omission from an artist's catalogue raisonné indeed can prove fatal to any potential resale of a work, notwithstanding any proof the owner may offer to support authenticity.
The United States similarly requires all cash transactions of $10,000 or more to be reported. Still, laundering involving art tends to be handled case by case. Federal prosecutors, who usually discover art-related laundering through suspicious banking activity or illegal transport across borders, have worked closely with other countries and aggressively used their powers under civil law to confiscate art that they can establish is linked to a crime, even in the absence of a criminal conviction.
Also the documents supposedly supporting the authenticity of the art were forged. According to the art fraud detective, the fraudulent art pieces looked like they had been purchased in a dollar store because they were so bad. When the police searched his one-room condo, some of the works still were wet with paint. At the time of his arrest, another buyer filed a complaint that the piece she purchased from him was a forgery (Moore, 2004).
The copying of famous works of art dates to the origins of the history of art collecting and therefore to the beginning of the history of art. In the ancient world, replicas of famous works were made in order to satisfy demand by collectors for such works. The bronze Spear Bearer (c. 450–440 bce) by Greek sculptor Polyclitus, for example, achieved great renown for its perfect proportions and beauty. As a result, it was often copied in marble for Roman collectors in subsequent centuries. The copies, which are all that survived into the 21st century, made no pretense of being the original or having been made by Polyclitus.