The purpose of this study is to draw attention to the – negative, according to the author – tendency of the legislator to depart from the original assumptions of the Law on Provision of Electronic Services in Poland, according to which it was to be an act comprehensively regulating the rules for making registered electronic deliveries in relations between public and nonpublic entities. It can therefore be said that it was supposed to act as a “constitution of delivery service”. In practice, however, the legislator maintained a number of technical and organizational solutions used either instead of or in parallel to the institutions provided for in the Law on Provision of Electronic Services. In addition, after the Law on Provision of Electronic Services has been passed, the consistency of the assumed assumptions is at least threatened by the introduction of further, competitive solutions, such as, in particular, delivery service via the Common Courts Information Portal, delivery of letters and documents via the ICT system - National Register of Debtors, or delivery service in administrative proceedings “to an account of the body’s ICT system”. Therefore, the question arises whether the legislator really has a coherent vision of changes in the field of electronic delivery service, and the Law on Provision of Electronic Services has a chance to introduce a revolution in the exchange of correspondence between public entities and relations in which at least one of the parties is a public entity.