Matthew Green owes the firm around £3m, according to legal documents filed by the peer-to-peer lender

Appeals court says that guidelines limiting number of sellers in four green spaces are constitutional

Social media giant pays out after closing French teacher's account for posting photo of the Origin of the World

Catalogues raisonnés emerge as the latest front in the battle to authenticate works and secure market value

Eric McNatt files lawsuit over artist’s reproduction of a portrait of rock musician Kim Gordon

Pierre Le Guennec changes his story claiming artist's wife gave him 271 works in rubbish bag

Heirs of Greta Moll are demanding London museum returns painting of their grandmother

Judge's findings reveal what to look out for in art transactions

The legislation, sponsored by presidential hopeful Ted Cruz among others, comes as the race for the US election heats up

Old Master works by Orazio Gentileschi, Frans Hals and Diego Velázquez drawn into dispute

Seven of 11 specialists named by the gallery say they never authenticated work that turned out to be a forgery

Eleanore De Sole said she went into a “shaking frenzy” when she read that another work sold by Knoedler was suspected to be fake

Domenico De Sole bought a fake Rothko from the gallery in 2004

Lawyers for the collectors and the gallery go head-to-head as one of New York’s biggest art world scandals goes to trial

In 2007 the creative industries consultant noted that the “insider” aspect of the contemporary art market and hierarchy of knowledge and status that it creates was a significant part of its attraction

Recent corporate scandals have raised concerns that American charities should be examining their ethics policies