Survivors of Nazi persecution are often thought of as vessels of memory: witnesses to history, providers of testimony. While these are important roles, survivors’ ongoing survival during and after the Holocaust provide insight into, among others, agency and resistance and histories of the circulation of knowledge and of forced migration, all of which transverse geographical and historical borders and build transnational bridges across them. In this paper, I demonstrate this through the history of Holocaust survivor Luba Melchior (1912-2000). Having survived the Radom ghetto and forced labor camps in Radom and Lublin, as well as in the concentration camps Majdanek, Auschwitz-Birkenau, Ravensbrück, and Malchow, she arrived in Sweden in spring 1945 with the Red Cross White Buses. Soon after, she became part of the Polish Research Institute (PIZ) in Lund, Sweden, which gathered evidence and testimony from other Polish survivors of Nazi persecution in 1945 and 1946. It is through this work that we can begin to trace the ways she, like other repatriates in Sweden, was not merely a passive recipient of Swedish humanitarian relief but was also an active agent in transnational social and political processes taking place in the immediate postwar period.