Recently, the President of the Office of Competition and Consumer Protection (UOKiK) has been very active in the field of the so-called payment gridlocks. Under the law, a fine may be imposed for excessive delays in payments in commercial transactions. In recent months, the President of UOKiK has initiated a number of proceedings against large enterprises on this account. In addition, by 31 January 2021, large enterprises (with a turnover above EUR 50,000,000) must submit reports on payment deadlines applied in transactions with business partners.