This article provides a comprehensive analysis of the historical development, legal frameworks, and contemporary practices concerning the legalization of foreign public documents in international law. Emphasis is placed on the transformation of document authentication mechanisms from traditional multi-layered procedures to standardized instruments such as the 1961 Hague Convention Abolishing the Requirement of Legalization for Foreign Public Documents (Apostille Convention) and the Brussels Convention. The study systematically examines the legal significance of multilateral and bilateral agreements, and delineates the principal methods of legalization, including the issuance of apostilles, consular legalization, and certification through chambers of commerce. Special attention is devoted to the challenges posed by administrative inconsistencies, technological disparities, and regulatory fragmentation across jurisdictions. Furthermore, the article assesses the role and implications of digitalization, particularly the implementation of the Electronic Apostille Program (e-APP), in fostering efficiency and legal certainty. It concludes by arguing for greater international harmonization and institutional capacity-building to ensure the effective cross-border recognition of public documents.

Apostille, consular legalization, document authentication

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