Special Rapporteur is a title given to individuals working on behalf of various regional and international organizations who bear specific mandates to investigate, monitor and recommend solutions to specific human rights problems.
There currently exist:
United Nations Special Rapporteurs under the Human Rights Council and (previously) the Commission on Human Rights ("special procedures"):
African Union Special Rapporteurs of the African Commission on Human and Peoples' Rights:
Organization of American States Special Rapporteurs under the aegis of the Inter-American Commission on Human Rights: