The topic of whistleblowers is discussed not only in the area of legal sciences, but also in widely understood journalism. The issue arouses controversy, and by some debaters it is called a return to the dark times of informing. The supporters of this institution point to the measurable benefits of using it. It was therefore considered justified to undertake scientific analysis and reflection on this issue. The article presents the institution of a whistleblower whose implementation is planned for the Polish legal system. It also attempts to explain the meaning of the institution and its perspectives in the area of administration. The article discusses the historical aspect of the signaller as well as its potential impact on public administration. The authors found that the experiences resulting from the analysis of this context may prove useful in forecasting the opportunities and threats accompanying the introduction of sygnalists to the Polish legal system. The issue of legal protection of whistleblowers was presented in turn. Finally, the draft of Law on transparency of public life was discussed and summary conclusions were presented.