On 29 October 2013 the Netherlands Museums Association launched the website Museale Verwervingen vanaf 1933 (Museum Acquisitions since 1933) (an English version will be available in 2014). This website has information about works of art, the possession of which by former owners might have been involuntarily lost during the Nazi regime.
The Restitutions Committee is the organization that parties can approach for independent investigation and advice about claims to these objects. The way such a request is handled depends on whether the claimed artwork is part of the Dutch National Art Collection. Information about claims to items in the Dutch National Art Collection can be found here. You can find more information about claims to works from other collections here.
The Restitutions Committee
The Advisory Committee on the Assessment of Restitution Applications for Items of Cultural Value and the Second World War (in brief referred to as: the Restitutions Committee) advises on claims to looted art. Works of art which former owners lost possession of because of theft, confiscation or (enforced) sale during the Nazi regime may now be owned by the State of the Netherlands (National Art Collection), a provincial/local government institution, a foundation or a private individual. Since early 2002, a claim to a stolen work of art can be submitted to the Restitutions Committee for investigation and advice as an alternative way of settling a dispute. The Restitutions Committee operates independently from the Ministry of Education, Culture and Science (OCW), and comprises lawyers, a historian and an art historian.