Stella Ingrid Goldschlag, also known as Stella Kübler-Isaacksohn and Stella Kübler was a German Jewish woman who collaborated with the Gestapo during World War II, operating around Berlin exposing and denouncing Berlin's underground Jews. After the war, Goldschlag "converted to Christianity and became an open anti-Semite".

Racial passing occurs when a person who is classified as a member of a racial group is accepted or perceived ("passes") as a member of another racial group. Historically, the term has been used primarily in the United States to describe a black or brown person or of multiracial ancestry who assimilated into the white majority to escape the legal and social conventions of racial segregation and discrimination. In the Antebellum South, passing as white was a temporary disguise used as a means of escaping slavery. Other instances include cases of Jews in Nazi Germany attempting to pass as "Aryan" and non-Jewish to escape persecution.