Electoral disinformation has become one of the most challenging problems for democratic states. All of them are facing the phenomenon of - both online and offline - dissemination of false information during pre-electoral period, which is harmful for individual and collective rights. As a consequence, some European countries adopted special measures, including summary judicial proceedings in order to declare that information or materials used in electioneering are false and to prohibit its further dissemination. There are already three rulings of the ECtHR concerning this expeditious judicial examination provided in the Polish law. In December 2018 France passed complex regulation against manipulation of information that include similar mechanisms. This article, basing on the ECtHR’s case law and some national experiences, attempts to define the minimal European standard for measures targeted at electoral disinformation, especially judicial summary proceeding. It contains the analysis of the notion of electoral disinformation, defines the state’s positive obligations in this sphere, and indicates mayor challenges for the legal framework. The principal argument is that summary judicial proceedings – if adequately designed – cannot be questioned from the Convention standpoint and provide a partial solution to the problem of electoral disinformation.