Chait's illegal rescue work ended when the Liberation of Belgium in September 1944 made Dutch-Paris unnecessary. From late 1944 until mid-1946, he worked with Weidner in the temporary “Netherlands Security Service” based in Paris. The service had the authority to uncover Dutch collaborators hiding in Belgium and France and to find and assist Dutch resisters in those countries. Chait used those resources to investigate the arrests within Dutch-Paris and to help returning resisters. In recognition of his actions to help fugitives such as Jews and downed Allied aviators escape from the Nazis, Chait was awarded the Dutch "Ridder in de Orde van Oranje-Nassau"; the Belgian "Chevalier de l'Ordre de Leopold II avec Palme", "Croix de Guerre 1940" and "Medaille de la Résistance" and the American Medal of Freedom.