The digital transformation of Islamic economic transactions has encouraged the use of electronic signatures as an instrument to improve efficiency, accessibility, and speed in the implementation of Islamic contracts. However, the use of electronic signatures in Sharia transactions raises legal issues concerning the validity of contracts and the legal status and evidentiary strength of electronically executed instruments, particularly in relation to the characteristics of authentic deeds under the Indonesian legal system. This study aims to analyze the validity of electronic signatures in Sharia transactions and their implications for the validity and evidentiary strength of authentic deeds. This research employs normative legal research using statutory, conceptual, and case approaches. The analysis examines legal provisions governing notarial authority, electronic transactions and electronic signatures, evidentiary law, and the principles of contracts under Islamic economic law. The results indicate that the use of electronic signatures may, in principle, establish the validity of electronic transactions provided that the requirements stipulated by applicable laws and regulations are fulfilled and the transaction does not contravene Sharia principles. Nevertheless, the use of an electronic signature does not automatically confer the status of an authentic deed upon an electronic document. The authenticity of a deed remains dependent on the fulfillment of formal and substantive requirements established under Indonesian notarial law. Therefore, the digital transformation of Sharia contracts requires harmonization between technological developments, positive law, notarial authority, and Sharia principles in order to ensure legal certainty and legal protection for the parties.
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