The National College of Probate Judges (NCPJ) is the only national organization exclusively dedicated to improving probate law and probate courts. "Probate jurisdiction" varies from state to state. However, generally, all probate courts handle cases involving the estates of deceased persons, adult guardianship and protective proceedings, and mental health and addictive disease treatment, and matters concerning developmentally disabled persons.  In some states, probate courts handle adoptions, certain juvenile matters, and/or guardianship and conservatorship of minors.