[Deepfake technology enables serious misuse from identity fraud to digital sexual exploitation harming victims materially and immaterially. This study examines civil liability for such misuse and proposes ius constituendum using a normative juridical method with comparative analysis of U.S. law. Deepfake misuse can be construed as onrechtmatige daad under Article 1365 of the Civil Code, yet Indonesia's existing laws remain partial and inadequate. In contrast, the U.S. has established more adaptive regulations through the Take It Down Act, California AB 602, and Tennessee's ELVIS Act. Based on this comparison, the proposed ius constituendum includes five components: a juridical definition of deepfake, proportional multi-actor liability, liquidated damages-based civil claims, platform notice-and-takedown obligations, and an AI law as lex specialist.]
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