EN
In the article the author responds to the study of prof. O. Ovečková on ordinary interest and default interest, and disputes her conclusion that during default the creditor is entitled to both, ordinary as well as default interest. In the author’s view, the creditor is entitled only to the higher of the two, since both claims are, to a certain extent, aimed at satisfying the same interest of the creditor. In the article, the author further discusses the nature of sanctions in private law, in particular the question whether private law sanctions really fulfil a preventive, punitive and compensatory function. He points out the difference between the function or substance of sanctions and their effect. He concludes that, at present, sanctions in private law essentially fulfil only a compensatory function. However, it does not exclude the possibility that they may also have a preventive or punitive effect in individual cases.