As a result of the amendment to the Code of Administrative Procedure, individual administrative matter may be settled not only by way of the administrative decision but also silently. The author assumes that this form constitutes a legal form of inactivity of public administration. The legal institution of silent (tacit) settlement is not of a self-executing nature as it constitutes a substantive structure. The Code regulates (describes) procedural aspects of this substantive phenomenon only, at the same time explicitly stipulating that a matter may be silently settled if a specific provision so provides. The Code defines a silence of the administration as: tacit – accordingly to a request – conclusion of the proceedings (if, within the statutory deadline, the administration authority does not issue a decision or ruling) and tacit permission (if, within the statutory deadline, the administration authority does not lodge an objection in the form of a decision). In the study, the author considers a legal implications of a procedural regulation concerning silence of the administration introduced as a form of a settlement of the administrative matter.