This chapter identifies different models of ethical-professional regulation involving journalists’ intervention in Europe. It analyses examples of regulation in which journalists participate, in the European context, while trying to identify the main characteristics of those organisations. The ambiguity in the use of the concepts appears even more pronounced in the co-regulation domain, especially on more generic definitions that point to different joint arrangements between public authorities, the private sector and civil society. In general terms, journalism self-regulation can be framed as the collective processes of standardisation of values and practices. T. Eberwein and C. Porlezza argue that the concept of media self-regulation commonly emerges linked to professional practices aimed at ensuring the quality of information. The Italian system presents a unique model in the western European context, which requires the compulsory registration in the professional Order of Journalists as a condition of practising journalism.