The article deals with use of hash technology and blockchain technology for the purpose of running register of shareholders in private companies in Poland. Different applications for these technologies are considered. Firstly, publication of hash of each subsequent version of the register of shareholders, what would serve to ensure that a hashed version was indeed an original of the register of shareholders at a given moment in time. Secondly, publication of hash together with publication of each subsequent version of the register of shareholders. That would serve the purpose of making the current version of the register of shareholders widely available, while hash would allow to ascertain that the published version is indeed the original one and no error has been made while publishing it. That would be useful in particular if the register of shareholders could not be otherwise accessed on distance. Thirdly, hashing of the current version of the register of shareholders together with the previous hash to create a blockchain. That would allow to ensure the sequence between different versions of the register of shareholders, preventing omission of any version or retroactive changes to the register of shareholders.

The article deals with analysis of Art. 129 of the Polish Insolvency Law regulating ineffectiveness towards the insolvency estate – in circumstances defined therein – of the remuneration of a manager or member of a supervisory board of the insolvent debt. Article claims, among others, that Art. 129 of the Insolvency Law, different than Art. 185.4 of the Insolvency Law, concerns only remuneration awarded prior to insolvency, whereas Art. 129.1 first sentence of the Insolvency Law such remuneration for the period prior to declaration of insolvency, while Art. 129.1 second sentence of the Insolvency Law such remuneration for the period following declaration of insolvency (although awarded prior to declaration of insolvency). The purpose of Art. 129 of the Insolvency Law is not to sanction actions detrimental to the insolvency estate, but to ensure economic consequences of insolvency are shared in a just way and therefore shared also by very important stakeholders that are nowadays managers and members of the supervisory bodies of the insolvent debtor. This interpretation heavily impacts on solving a number of interpretation issues posed by the wording of Art. 129 of the Insolvency Law.