In 1945, Cavendish-Bentinck was given his final diplomatic posting on his appointment as Ambassador to Poland. When visiting the formerly German City of Stettin (Szczecin) in 1946 he was invited to talk to German civilians suffering from months of internment so their possessions and property could be taken over by Polish resettlers from territories lost to the USSR. Cavendish-Bentinck refused to do so, ignoring certain inhuman circumstances under which mainly old people, women and children had to suffer, by noting to his Polish hosts, he was "convinced that they will complain as usual".