The article presents the specifics of ecclesiastical legal acts, focusing on the issue of their binding force. The research hypothesis concerns the question of whether every document issued by the highest ecclesiastical authority has a legally binding character sensu stricto or is merely recommendatory. The aim of the study is to indicate the differences between various church acts and to assess whether the title of an act always corresponds to its actual legal force. The article classifies church documents into normative, recommendatory-interpretative, and doctrinal-pastoral categories. It also presents criteria that allow for the identification of the nature of a document, including its title, content, language, purpose, issuing authority, and addressees. The analysis highlights interpretative difficulties arising from the ambiguous determination of the legal character of documents and demonstrates that the application of the proposed criteria allows for distinguishing binding acts from non-binding ones. The research was conducted using the doctrinal-legal method and an analysis of legal sources.