Transnational crime, particularly Trafficking in Persons (TPPO), poses a serious threat to national security due to globalization and the ease of cross-border movement. Indonesia's geographical position as an archipelagic state makes it highly vulnerable to this form of modern slavery. This research aims to analyze the vital role of immigration supervision at the border in combating TPPO from a criminological perspective. The research method is qualitative with a normative juridical approach, utilizing a literature study of relevant laws and literature. The results indicate a strong correlation between weak immigration supervision and the rise of TPPO. Indonesia has a legal foundation through its Immigration Law (UU No. 6/2011), Anti-Trafficking in Persons Law (UU No. 21/2007) , and the ratification of the UN Convention Against Transnational Organized Crime. Operationally, countermeasures include administrative and field supervision, the establishment of the "Kresna" Intelligence Team, and synergy within the Customs, Immigration, and Quarantine (CIQ) system. From a criminological aspect, crime prevention is paramount. It is concluded that strengthening border supervision is imperative. Recommendations include enhancing inter-agency cooperation, utilizing technology, increasing the capacity of officials, and strengthening international cooperation to dismantle criminal networks.
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