Research on Jewish responses to the Nazi persecution of the Jews and the Holocaust has largely focused on communities and organizations and less on individuals. In the paper, Rudberg examines the private diplomatic efforts of Olof Lamm, a Swedish Jewish ex-diplomat and businessman, who used his personal network to protest against Nazi persecution of the Jews in Germany, and lobby on the United States to admit more Jewish refugees. The paper sheds light on how this informal back-channel diplomacy was performed, and on how the petitioned justified their defence of Nazi policy and restrictive immigration policy.