The definition of media literacy has been changed forever with the popularization of the term fake news after the 2016 US presidential elections. Although the notion of fake news has been known to media professionals long before, the term has become a part of the everyday vocabulary of an average media content consumer after the last elections. A need to further verify the accuracy of information has appeared beside the critical understanding and the analysis of information obtained through the media. Fact-checkers have evolved with the development of fake news and their goal is to verify and evaluate the authenticity of the news that is produced and transmitted by the media. This paper aims to present the methodology of those fact-checking portals as well as to examine the dominant topics on the selected portals, their content subjects, the sources of questionable statements or information and who they relate to. The posts of fact-checkers based in Croatia, Serbia and Bosnia and Herzegovina, who are included in the Duke Reporters' Lab database of world fact-checking portals, have been analyzed using a method of the combined qualitative and quantitative content analysis. The results of the survey, among other things, showed that on average three quarters of the total number of articles on all three portals were judged to be untrue, while only one in ten disputed statements or data came from social networks and all the rest from traditional media. The methods of verifying those statements are similarly distributed across all portals, and it is important to emphasize that the interaction of the audience with the portal postings on the social network profiles, although different for each of the portals selected, is actually equal in terms of a very small percentage compared to the total numbers of their followers.