The Art Loss Register screens catalogues of national losses and auction house catalogues for stolen items and responds to provenance enquiries. It has a specialist World War II provenance research service for those tracing items looted, stolen or forcibly removed from families between 1933 and 1945.
The Art Loss Register issues certificates to dealers and auction houses to confirm that they have searched the database with regard to a specific item. It is free to law enforcement agencies but otherwise charges a fee per search or an annual subscription.
Clicking the link on this page will open The Art Loss Register website.