According to the "Sterbebücher" (death records) of Auschwitz, Jozeph Frank was murdered there on 10 October 1942. This date is different from the official date of death of 30 September 1942 as determined by the Dutch Ministry of Justice after the war. However, for the time being, the website joodsmonument.nl, only list the dates of death, as published at the time in the Government Gazette ("Staatscourant") by the Ministry of Justice .
The certifcate of death accordint to the "Sterbebücher" of Auschwitz
The official Dutch certificate of death, no. 66 dated 25 August 1950 made out by the Municipality of Zuilen, from the Utrechts Archief: (after clicking, wait a moment until the archive opens, scroll down to the second yellow shaded Jozeph Frank, click on it and after opening, click on number 40 after which deed 66 (and 65) will open and you can view the deed).