Although the development of digital technology has encouraged the transformation of notarial services in Indonesia, studies that specifically discuss the legal liability of notaries in the preparation of digital-based authentic deeds remain limited. This study aims to analyze notaries’ liability in the preparation of digital-based deeds under the Law on Notary Position and to examine the evidentiary strength of digital-based notarial deeds in the evidentiary system in Indonesia. This study used a normative legal research method with statutory and conceptual approaches. The legal materials analyzed consisted of primary, secondary, and tertiary legal materials collected through library research. The results show that notaries cannot yet be held liable for preparing authentic deeds through electronic systems because there is no statutory regulation that explicitly governs the preparation of authentic deeds electronically. The form of notarial liability may be civil in nature if the deed is considered invalid or is degraded into a private deed, thereby causing losses to the parties and giving rise to an obligation to provide compensation. From the aspect of evidentiary strength, digital-based notarial deeds do not yet have clear legal certainty and are at risk of being degraded into private deeds due to a conflict of norms between the Law on Notary Position, which requires physical presence, and the Electronic Information and Transactions Law, which recognizes electronic documents as valid evidence. The conclusion of this study emphasizes the importance of regulatory harmonization between the Law on Notary Position and the Electronic Information and Transactions Law to strengthen the legal status of electronic notarial deeds. These findings contribute to the development of the theory of legal certainty in digital notarial services and have practical implications for the government in formulating specific regulations on Cyber Notary and for notaries in applying the principles of prudence and accuracy in digital services.