Henri Baudoin was an auctioneer in Paris, working from 1908 until 1942. The Art Looting Investigation Unit (ALIU) placed his name on the red flag list for France, based on his business ties and sales to Karl Haberstock.

Source:

M1782-OSS Art Looting Investigation Unit Reports, 1945-46. Final Report. https://www.fold3.com/image/232005909?terms=baudoin. Accessed 14 June 2021.