![Baner Consilium Iuridicum](https://ojs.academicon.pl/public/journals/26/pageHeaderLogoImage_pl_PL.png)
The identity of an administrative matter disposed of in the form of an administrative decision is an important issue that should be taken into account by both the authorities conducting he proceedings in the first instance and the authorities conducing the appeal proceedings. The principle of deciding within the boundaries of the matter requires that the authority of first instance should not decide on issues that go beyond the boundaries of the matter. The elements that determine the boundaries of a matter vary over time; therefore, in order to determine the boundaries of the matter, we must know when it arose. On the other hand, the cessation of an existing matter (including the cessation of it as a result of its transformation into a new one) renders the
proceedings to which it was the subject groundless. The principle of two-instance proceedings requires that the appeal authority decides in the same matter as the authority of first instance. Thus, the question arises about the boundaries of the administrative matter, he moment of its creation and the elements whose change leads to the creation of a new matter, ending the existence of the existing one, and those whose replacement does not affect the identity of a matter.