Coronavirus Disease 2019 (COVID-19) is the most dramatic pandemic of the new millennium, and extraordinary measures concerning with health, law and policy are required around the world. One of these is without doubts the "green pass", officially known in the European Union (EU) as EU Digital COVID Certificate (EUDCC). Initially conceived as a tool for overcoming the lockdown restrictions, it has unexpectedly turned into a means of discrimination between pass holders and non-holders, thus increasing social tension at the expense of solidarity and brotherhood. Here, we analyze in depth the dark sides of the "green pass" in the light of the European and international legislation and of the ongoing pandemic scenario.