The rise of electronic-based (online) fraud in Indonesia creates legal uncertainty and material losses for the public. This study aims to analyze the application of Article 378 of the Criminal Code (KUHP) in conjunction with the Electronic Information and Transactions (ITE) Law in law enforcement and to identify the obstacles faced by police investigators. The research method employed is normative legal research utilizing both a statute approach and a conceptual approach. Primary and secondary legal materials were gathered through literature studies and analyzed qualitatively. The results show that law enforcement against online fraud perpetrators requires harmonization between general criminal qualifications and specific provisions under the ITE regulation. The findings reveal that the primary constraint in the evidentiary process lies in the anonymity of perpetrator accounts, easily deleted digital footprints, and cross-border jurisdictional hurdles. Therefore, optimizing the technical capacity of law enforcement officers and formulating more adaptive legal prosecution framework for cybercrimes are necessary
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