In May 1933, the so-called Bernheim petition was submitted to the League of Nations in Geneva on behalf of the Paris Comité des Délégations Juives. With it, the disenfranchisement of German Jews by National Socialist Germany was charged under international law. It caused all anti-Jewish laws in Upper Silesia to be suspended by 1937. This complaint, its genesis and its astonishing consequences from today's point of view have largely been forgotten, as has Jewish minority diplomacy as a whole or its individual representatives, e.g. Leo Motzkin, Emil Margulies or Nathan Feinberg. Philipp Graf examines the petition in the context of the general minority problems of the interwar period gives insights into the practice of non-governmental Jewish interest representation.