It is debated whether German similarly to English has an obligatory subject position and consequently expletive subjects. The aim of my thesis is to find an answer to this question. I provide a summary of the history of the Extended Projection Principle and of subject positions in general. I present the inconsistent expletive interpretations of Vikner (1995) Cardinaletti (1990), Cabredo Hofherr (1999), Mohr (2005), and Haider (2019). I display the results of the corpus-based research I conducted on German impersonal passive constructions in the KorAP web-corpus.