Alternative Dispute Resolution (ADR) is a procedure in community practice which then gets recognition in the eyes of the law to settle a case between two or more parties by way out of court in a formal manner (litigation). ADR is considered to have more advantages, including easy, cheap, and fast, so it is more efficient and effective than solving cases in court. This paper aims to examine the existence of ADR in legal practice in Indonesia with a comparative review of the state of Timor Leste. The results of this paper reveal that compared to Timor Leste which is still new, Indonesia has first implemented ADR practices within a formal legal framework. Timor Leste actually also uses the ADR scheme in its daily community practice, but its implementation takes into account the elements of custom and society rather than the legal norms.

<p align="center"><strong><em>Abstract</em></strong></p><p><em>Currently, the business sector that is being intensified by the Indonesian government is the mining sector which is aimed at increasing state revenue. The state revenue aims to prosper the people's welfare, which is guaranteed by the constitution of Article 33 paragraph (3) of the 1945 Constitution of the Republic of Indonesia which states that the land, water and natural resources in it are state control designated in the event that prosperity of the people. In developing the mining business sector, Indonesia needs cooperation from foreign investors to adequately fulfill various needs. In developing the mining business sector, Indonesia needs cooperation from foreign investors to adequately fulfill various needs. In developing the mining business sector, Indonesia needs cooperation from foreign investors to adequately fulfill various needs. Therefore, Indonesia is cooperating with a company from America, namely PT. ExxonMobil. However, in the implementation of their investment activities, there are many problems, especially with the communities around the mining area. Therefore, this study aims to analyze the form of PT. ExxonMobil's responsibility for investing in Indonesia using normative juridical research methods..</em></p>