To understand how is citizenship being transformed, especially in Southern Europe, we need to go beyond formal and legal definitions. Two main paradigms can help us to grasp the complex transformations occurring in citizenship. The first refers to a secured citizenship, a process consolidating a specific model of order and society and establishing rigidly acceptable forms of doing politics and therefore of being citizens. In contrast with the secured citizenship, but also in a process of constant and mutual constitution, we introduce the idea of act of citizenships, defined as creative and unexpected acts, individual or collective, through which new subjects, as well as new forms of political engage are created. To better understand the interplay between this opposite forces I propose to analyse the case of the spanish Mortgage Affected Platform and the campaign they launched around an action called "escrache" and the reaction of the spanish government.