The Agreement on Transboundary Haze Pollution (“ATHP”), which has been signed by ASEAN member states, aims to overcome the annual haze problem in the region. Since the treaty came into force on 25 November 2003, the signatory nations urged Indonesia, the dominant contributor to the haze pollution, to ratify the agreement. After taking more than a decade to consider, Indonesia finally ratified the agreement in 2014, evincing its serious effort to prevent future forest fires. This study analyzes important issues of state responsibility and effective legal recourse to cope with the unresolved haze problem. Due to the ineffectiveness of ATHP, this study presents two effective legal measures: utilizing another relevant international treaty that offers an effective dispute settlement mechanism and building international awareness to stop using products from endangered forests.