
Both the provisions of Directive No 2019/1937 and the Polish Law on the Protection of Whistleblowers provide for the exclusion of a whistleblower’s liability for violation of the rights of others or of statutory obligations once the requirements provided for in the aforementioned legal acts have been met. The subject of the study is, firstly, an analysis of how the entry into force of the Law on the Protection of Whistleblowers has affected the civil law protection of personal rights. Secondly, the paper characterises the postulated rules of interpretation of the prerequisites on which the above-mentioned act makes the exclusion of unlawfulness of actions of a whistleblower dependent, above all, the requirement to have reasonable grounds for claiming that information presented by a whistleblower in a notification or public disclosure is true and constitutes a violation of law within the meaning of the act. The article also presents a de lege ferenda proposal.