Monitor Prawniczy no. 23/2017 Penal law consequences of dishonest issuing or using an invoice under the provisions of the amended Penal Fiscal Code (critical remarks following the amendment of 1 December 2016) Olaf Włodkowski Non-copyright protection of scientific research findings, hypotheses and theories Marcin Kłoda Liability of information portals – Part II Teresa Grzeszak, Beata Janiszewska Remarks on the course of the case Delfi AS v. Estonia Beata Janiszewska The defendant in cases for publication of a disclaimer Marcin Dziurda A patent agent as a litigation attorney in civil proceedings Tadeusz Zembrzuski Conflict between the interest of the proxy and the principal in case when the power of attorney has been granted to secure a claim Paweł Widerski