This report critically evaluates BHP Billiton's Corporate Social Responsibility (CSR) disclosures in its 2016 and 2017 sustainability reports following the 2015 Brazil mine disaster, using legitimacy theory as a framework. The analysis examines whether these disclosures were genuine attempts to serve communities or merely efforts to regain legitimacy after the incident eroded public trust. It references peer-reviewed academic literature to support its evaluation of BHP Billiton's response and the effectiveness of its CSR initiatives in addressing the environmental and humanitarian crisis caused by the dam failure. The report also highlights the company's efforts through Fundação Renova and various compensation programs aimed at restoring the environment and supporting affected communities, concluding with an assessment of whether these actions successfully mitigated the damage to the company's reputation and societal standing.