The circumstances under which the Natzwiller records came into American custody are not clear. A form accompanying the records suggests that a transfer to the Office of Strategic Services archives was planned. However, the transfer never took place, and the Natzwiller records were accessioned at the National Archives and Records Administration along with other War Crimes Branch Records. These records currently comprise Series 136 of NARA Record Group 153. The United States Holocaust Memorial Museum Archives received the microfilm in 1990.