I reply in English, as most of our fellow detectives don't speak French : nobody is perfect !
- I have discovered it's not easy to recover a post on this forum only by its number, so I attach again the finding aid of "Alpes Maritimes war archives" and some papers by historians about fate of Jews in this area.
- As soon as October 1940, Jews in France (foreign and French citizens) had to register themselves at police station in the place were they were living, free or house arrested. So files are kept in Police archives by the various "Archives départementales". When they registered, the infamous inked stamp "JUIF" was printed on their identity card.
- After the first rounds-up of Jews in 1941, some clever Jews printed themselves "JUIF" on their card without going to be registered at the police station. When they were controlled in the street, foreign Jews couldn't hide they were Jews (accent in french, etc.) but as the stamp was printed, policeman couldn't guess they weren't known by the administration and not written on lists for further round-up.
- When process of "dénaturalisation" (of Jews being French by easy 1927' naturalization law) started in 1942-1943, administration had to find where Jews were living across France from there official address before 1939. Decree of dénaturalisation was published in Journal Officiel of French laws, but of course, it wasn't the first reading of our Jews in the hiding. Some never heard of the decree. But police read it and could check with persons on their lists and go to search them.
- Concerning registration of foreign Jews living in France who were stateless (as soon as 1918 and as late as ...now, as others refugees), they were and they are registered at OFPRA, "Office français de protection des réfugiés et apatrides" : this is a State administration, https://www.ofpra.gouv.fr/fr/histoire-archives/archives
- You can ask (in French) if they have a file at your "Losts" : https://www.ofpra.gouv.fr/sites/default/files/atoms/files/formulaire_consultation_arc.pdf
Archives & history of Medem Center - Arbeter Ring (Bund / Workmen circle of France)