The authority of PPAT is governed by Government Regulation No. 24 of 2016 and Government Regulation No. 24 of 1997; however, these regulations do not provide specific details regarding PPAT's authority. Additionally, the reliance of PPAT on instructions from the National Land Agency (BPN) limits their ability to act independently, hindering efforts to prevent land mafia practices. A significant challenge arises from the absence of specific legislation that regulates the authority and responsibilities of PPAT, which can lead to potential abuse of power and errors in task execution.

The purpose of this study is to analyse the authority of PPAT in preventing land mafia practices according to existing laws, to examine the principles that can serve as a basis for optimising PPAT's responsibilities in preventing land mafia, and to analyse the consequences of abuse of power by PPAT.

The research employs a normative juridical method using legislative, case, concept, and historical approaches. This study also utilises primary, secondary, and tertiary data to address the research problems, with data analysed qualitatively.

The findings indicate that Government Regulation No. 24 of 2016 and Government Regulation No. 24 of 1997 do not provide specific details regarding PPAT's authority, potentially leading to abuse of power and errors in task execution. Applying the principles of legality, caution, and good faith in PPAT's duties can serve as guidelines to optimize their responsibilities in preventing land mafia practices. Consequences of power abuse result in not fulfilling the formal and material requirements of the deeds issued by PPAT, rendering these deeds void or invalid by law. Depending on the error committed, PPAT may face legal consequences, whether administrative, civil, or criminal.

It is recommended that the government promptly formulate specific legislation that clearly and comprehensively regulates the authority and responsibilities of PPAT. Continuous training and education programs for PPAT should be implemented, and PPAT's supervision should be strengthened.