The presence of "fałszywkas" in the secret police archives makes the process of lustration extremely sensitive in Poland, leading to a number of highly publicized cases for slander or libel. Many prominent politicians, such as the Minister Władysław Bartoszewski (a former Auschwitz concentration camp prisoner), and Professor Jerzy Kłoczowski (a member of the UNESCO Executive Board), have been among their targets. Kłoczowski was defended against a libelous SB "fałszywka" by a 2004 letter published in the newspaper "Rzeczpospolita", signed by many Polish intellectuals, including Professor Jerzy Buzek, Tadeusz Mazowiecki, Jan Nowak-Jeziorański, Professor Władysław Bartoszewski, Professor Andrzej Zoll, Józef Życiński, Andrzej Wajda, Professor Barbara Skarga, Professor Jan Miodek, Professor Jerzy Zdrada, Aleksander Hall, Władysław Frasyniuk, Professor Adam Galos, and Krystyna Zachwatowicz.