Abstract
The aim of the paper is to discuss the current legal regulation of the invalidity of a legal act and its weak spots, which are influenced in particular by the priorization of absolute invalidity before relative invalidity. In this context, however, legal practice, based on induced development trends and real needs „coming from the outside“, points to overcoming this view and to the perception of invalidity both as an exceptional legal consequence of imperfect will (legal action should be viewed rather as valid than as invalid if both interpretations are possible) and at the same time – if the legal act shows features due to which it should be invalid, the relative invalidity that allows its recovery should take the priority over absolute invalidity.