<![CDATA[This research analyzes the validity of the sale and purchase of collateral objects carried out without going through an auction process, as examined in Supreme Court Decision Number 3507 K/Pdt/2023. This study focuses on civil law aspects related to the sale and purchase agreement and its implications for the protection of the rights of creditors, debtors, and third parties involved. This research uses normative legal research methods with statutory, case, and conceptual approaches. Data sources include primary legal materials, such as court decisions and related regulations, as well as secondary legal materials in the form of relevant legal literature. Data collection techniques were carried out through literature study, and data analysis using descriptive qualitative methods. The results show that the sale and purchase of collateral objects without auction authorized through a deed of sale and purchase is legally flawed and contrary to applicable laws and regulations. Supreme Court Decision Number 3507 K/Pdt/2023 stated that the defendants' actions, which included making a sale and purchase deed without the knowledge of the owner of the collateral object, were unlawful. The decision overturned a previous court decision that declared the sale and purchase deed valid. The differences in legal considerations between the District Court, High Court, and Supreme Court reflect the importance of consistent enforcement of legal procedures in the sale and purchase of collateral. This research confirms that the implementation of auction as a formal mechanism for the execution of collateral is very important to ensure legal certainty and protect the rights of all interested parties. The practical implication of this finding is the need to strengthen supervision of collateral execution to prevent violations that can harm debtors and disrupt legal stability in the field of property security.]]>
