May I had an example to my previous reply ? One of my husband
uncles was arrested in 1942 in September 1942, so that another
member of that Jewish family : the family had a second home
with a gardener and this one denounced some members of that
family, hoping to become the owner of the house.That uncle
of my husband had a double nationality : French and Swiss.
Now, Swiss Jews were protected and couldn't be
arrested, since Switzerland was one of the "neutral"
countries during WWII. After his arrival in Drancy, that
man moved heaven and earth to get a certificate attesting
he was Swiss. The certificate arrived a few minutes before
the train left France. My husband's uncle was already in
the train when some policeman brought the document. They
had to release him immediately.
--
Eve Line Blum-Cherchevsky
Besancon (France)
and also
Cercle de Genealogie Juive (International JGS in Paris)
http://www.genealoj.org