The holistic, society-wide approach adopted in Germany’s strategy to combat terrorism and Islamist extremism calls for case-by-case cooperation between civil society and public authorities. Given diverse institutional mandates, operational approaches and self-perceptions of relevant actors, such cooperation requires a shared framework of understanding. The legislature provides this framework through applicable legal provisions. This article aims to offer an overview of these legal conditions, beginning with the principle of confidentiality and the obligation to maintain confidentiality regarding information that counseling professionals encounter during their work. This principle is not only a fundamental standard in counseling, but is also enshrined in various legal sources. The article identifies these sources across different areas of law and discusses the legislative objectives behind them. Furthermore, the article addresses the legal exceptions to the principle of confidentiality, distinguishing between the obligation to disclose and the authorization to disclose. It also highlights the different mandates and roles of relevant institutions and professions in tertiary prevention in identifying potential interfaces for the implementation of their respective tasks.