On January 1, 2020, a new version of the Act on payment periods in commercial transactions enters into force. Compared to the previous regulations in force since 2013, the main change consists in allowing direct intervention of the administrative body – the Office of Competition and Consumer Protection – to punish business entities for establishing and accepting payments on dates contrary to the Act. Depending on the Office’s activity, the change may prove to be extremely painful, especially for large business entities.