In the Czech Republic, there is no comprehensive special whistleblowing legislation. If the notificationis made within industrial relations, more precisely within private-law relations, then protection ofwhistleblowers as well as the ones who are notified, provides direct support especially the legislation on protectionof personal data and indirectly also the constitutional foundations of the Czech legal order. TheSupreme Court of the Czech Republic and the Constitutional Court of the Czech Republic have commented,in the context of the principle of employee loyalty, on a practice which could be described as whistleblowingin the area of employment. The courts have in principle confirmed that even without an explicit legal basisit is possible in the legal order of the Czech Republic to found necessary normative basis for this practice.