National report for the purposes of the 19th International Congress of Comparative Law Vienna2014 deals with the civil law consequences of corruption in international commercial contracts from the perspectiveof the Czech law. The report answers the questions of what actions may be considered corruptionand classified as criminal acts. Attention is paid to civil law statutory regulation, i.e. unfair competitionwhere the New Czech Civil Code is taken into consideration. The authors deal also with the applicability ofgeneral legal instruments of private law as good morals or principles of fair business conduct.