In November 1947, the former member of the "Schutzstaffel" (SS) appeared in a Kraków, Poland courtroom, along with 40 other SS guards in the Auschwitz trial. Lächert sat next to three other former SS women, Alice Orlowski, Therese Brandl and Luise Danz. Because of her war crimes at Auschwitz and Płaszów, the former guard and mother of two surviving children was given a sentence of 15 years in prison. Lächert was released in 1956 from a prison in Kraków. In 1975, the German government decided to try 16 former SS guards from the Majdanek concentration camp. Lächert was one of these, along with Hermine Braunsteiner and Alice Orlowski. From 26 November 1975 until 30 June 1981, the accused were tried in a Düsseldorf courtroom.