Deliberative democratic processes are threatened by the intentional large-scale misinformation that is spread through the internet and the social networks, which have significantly increased the risk of the electoral manipulation of public opinion. Any good specialist can manage at present the emotions of millions of people to place them at the service of their own interests. Member states of the European Union are organised and collaborate in order to fight against this type of misinformation. This paper analyses how far law can and must react to fake news, evaluating the scope, the nature, the content and protected legal asset of "the right not to be deceived".