Back in February 2011 ArtLyst reported that the disgraced international art dealer Helly Nahmad was in possession of a $20m painting by Amedeo Modigliani, "Seated Man with a Cane" (1918) that had allegedly been stolen by the Nazis from Oscar Stettiner, a prominent Paris gallerist. In 1939. Stettiner escaped Paris leaving the painting behind. The work was confiscated by Marcel Philippon, who was appointed by the Nazis to sell the Stettiner property.

The Nahmad family is now being sued by relatives of the descendants of Oscar Stettiner the original owner of the masterpiece. Helly Nahmad who is currently serving a prison sentence of 366 days as punishment for his involvement in a Russian mob linked, high-stakes gambling ring was, needless to say, unavailable for comment. He was arrested in 2013 as part of an inquiry into illegal gaming promoted as private parties for high net worth individuals including film stars, professional athletes and bank bosses.