The preparation of a Sale and Purchase Deed (Akta Jual Beli/AJB) by a Land Deed Official (Pejabat Pembuat Akta Tanah/PPAT) requires compliance with statutory provisions and the principle of prudence. Problems arise when an AJB is prepared in circumstances involving an unlawful act, particularly when the PPAT’s conduct contributes to legal defects or causes loss to the parties. This study aims to analyze the legal consequences of an AJB containing an unlawful act and to examine the civil liability of a PPAT whose conduct causes loss to the parties. This research employs normative juridical methods using statutory, case, and conceptual approaches. Primary legal materials consist of legislation and court decisions, while secondary materials include legal books and journal articles. The materials are analyzed qualitatively through systematic and grammatical interpretation. The study finds that the legal consequences of an AJB involving an unlawful act depend on the nature of the legal defect and the court’s determination, including cancellation or loss of its legal effect. A PPAT may be held civilly liable when it is proven that the PPAT violated legal duties or the required standard of professional care and that such conduct caused compensable loss. Therefore, the assessment of PPAT liability must be based on the specific conduct, fault, loss, and causal relationship established in each case.
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