<![CDATA[Marriage registration is a crucial component of contemporary Islamic family law, as it ensures legal certainty of marital status, provides proof of legal relations, and safeguards the rights of family members. However, state administrative registration was not established as a pillar (rukn) or valid condition (syaraṭ) for marriage within classical jurisprudence (fiqh) frameworks. This study aims to analyze the legal standing of marriage registration in Indonesian Islamic family law and evaluate its normative legitimacy through the concept of public interest (maṣlaḥah mursalah) from an uṣūl al-fiqh perspective. Applying normative legal research methods, this study uses statutory and conceptual approaches. Legal materials were analyzed qualitatively using descriptive-analytical and argumentative methods, drawing on marriage regulations, classical jurisprudence literature, uṣūl al-fiqh, and contemporary Islamic family law studies. The results indicate that marriage registration is more appropriately categorized under contract documentation (tawthīq al-‘aqd) rather than as a new pillar of marriage. It serves preventive, evidential, and protective functions in safeguarding the legal consequences of marriage. From the perspective of maṣlaḥah mursalah, registration derives legitimacy because it does not contradict sacred texts (naṣṣ), yields genuine public benefits, and protects lineage, property, and family relations with certainty. This study emphasizes that maṣlaḥah mursalah functions not only to legitimize registration requirements, but also serves as a critical instrument to evaluate whether registration regulations effectively deliver family protection in a manner that is fair, proportional, and aligned with the higher objectives of Islamic law (maqāṣid al-sharī‘ah).]]>
