<p>The commentary raises the problem of the admissibility of the issuing cumulative penalty in cumulative judgement by appeal court for the first time or issuing that penalty within the different scope of punishment, from the perspective of the power to alter decisions of a court of the first instance, the principle of two-instance court proceedings, access to court and the right of defence. By discussing the essence of the constitutional and convention provisions, the author attempts to answer the question what the scope of the appeal court’s power is to alter cumulative judgement issued in the first instance, by concluding that neither Article 176 (1) of the Polish Constitution, nor Article 6 of the European Convention on Human Rights (ECHR) and Article 2 of Protocol no. 7 to the ECHR supplementing its content, as well as Article 14 (5) of the International Covenant on Civil and Political Rights in principle stand in the way of such an approach, which should be reflected in the process of interpretation of Article 437 (2) of the Code of Criminal Procedure. However, in the author’s opinion, doubts arise, from the perspective discussed above, if the appellate court were to take into account, when imposing the cumulative penalty, a unit judgement unknown, for various reasons, to the court of first instance, to which a special part of the considerations and critical remarks is devoted.</p>