<![CDATA[The rapid development of information and communication technology has facilitated the emergence of various forms of digital transactions, including the electronic and cross-border sale and purchase of digital assets. This phenomenon necessitates legal certainty through authentic legal instruments capable of ensuring the validity and evidentiary value of such transactions. However, the concept of cyber notary as a form of notarial service digitalization has not yet been comprehensively regulated within the Indonesian legal system. Legal issues arise from the regulatory disharmony between the Law on Notarial Office, which requires the physical presence of parties before a notary, and the Law on Electronic Information and Transactions, which recognizes electronic documents and electronic signatures as legally valid evidence. This normative gap creates legal uncertainty regarding the authenticity, evidentiary force, and cross-border recognition of digital asset sale and purchase deeds executed electronically. This study aims to analyze the regulatory disharmony between the Law on Notarial Office and the Law on Electronic Information and Transactions in the implementation of cyber notary, as well as to formulate a legal risk mitigation model for the execution of cross-border digital asset sale and purchase deeds based on cyber notary. The research employs a normative legal method using statutory, conceptual, and comparative approaches. Legal materials are analyzed prescriptively to formulate solutions to the identified legal issues. The findings indicate that the normative inconsistency between the Law on Notarial Office and the Law on Electronic Information and Transactions has resulted in legal uncertainty concerning the authenticity and evidentiary status of electronic notarial deeds. To mitigate these legal risks, regulatory harmonization is required, accompanied by the strengthening of digital identity verification mechanisms, the utilization of certified electronic signatures, the implementation of robust cybersecurity systems, and the establishment of legal frameworks governing the recognition and enforceability of electronic deeds in cross-border transactions. Such a mitigation model is expected to enhance legal certainty, legal protection, and the effective implementation of cyber notary practices in the global digital asset transaction ecosystem. Keywords: cyber notary, digital assets, sale and purchase deed, cross-border transactions, legal risk mitigation.]]>
