The aim of the article is to examine legal regulations in the context of answering the question whether – and if so, then under which circumstances – marketing activities performed via means of electronic communication are legal when the party conducting these activities does not have the prior and explicit consent to perform them. In particular, the article will analyze the provisions of Article 10 of the Act on provision of services by electronic means and Article 172 of the Act – telecommunication law, which are the key legislative provisions to resolve this issue. To answer the question posed in the article, the subject and object scopes of both legal norms in particular will be compared. Such a comparison is necessary to determine whether – and if so, then what kind of – marketing communication can be made without prior and explicit consent. On the other hand, the author will not discuss more broadly the issues concerning the processing of personal data, although he will draw attention to the conditions that must occur in order for the personal data held by the controller to be used for the purposes identified above.