This is a white paper for companies unfamiliar with 3TG (i.e. tin, tantalum, tungsten, and gold) mineral sourcing to live up to their ethical responsibilities. It provides a legislative overview as well as industry initiatives, supply chain initiatives and certification standards in global responsible mineral sourcing. The paper was inspired by the situation of DRC, but is intended for general purpose. Along a similar vein, although it references the Dodd-Frank Act, its application is not limited to US-listed companies and instead intended for general use.