Dopuszczalność potrącenia wierzytelności wynikających z bezskuteczności czynności upadłego z mocy prawa

This article is devoted to the issue of offsetting claims in the course of bankruptcy proceedings. Considerations are limited to the situation in which one of the claims arose due to the ineffectiveness of the bankrupt's actions under the law itself. The issue remains at the interface between bankruptcy and civil law. in addition, two civil law institutions (modified by insolvency law) were collated: offsetting claims and ineffectiveness of legal action.