This paper discusses conflicts of interest in the context of public relations. The fundamental problem discussed in the paper is how to identify and prevent conflicts of interest in sectors that are particularly prone to conflicts of interest. The aim of this paper is to point out the importance of ethical thinking in the business world and to strengthen the awareness of morality in public and social action. The introduction tries to define ethics, business ethics and morals, corruption. The following section defines the conflict of interest according to the Law on the Prevention of Conflicts of Interest and important regulations of the Commission for the Prevention of Conflicts of Interest. The conflict of interest is analyzed in a specific case in which the Court of Croatian Public Relations Association initiated proceedings. Finally, a conclusion is made as to which methods to apply and how to prevent conflicts of interest in public actions.