According to the "Sterbebücher" (death records) of Auschwitz, Hartog Frank was killed there on 11 September 1942. This date is different from the official date of death of 17 August 1942, as determined by the Dutch Ministry of Justice after the war. For the time being, the website joodsmonument.nl, list only the dates of death, as published in the State Newspaper (Staatscourant) by the Ministry of Justice.
Date of death as per Auschwitz death record (Sterbebuch)