This chapter argues that, especially in the East Frankish Kingdom, Carolingian advocates were operating as key local agents for churches on their estates by the mid-ninth century at the latest. While the sources from the West Frankish and Italian parts of the Carolingian empire suggest different trends, the East Frankish sources (especially royal grants of immunity) demonstrate that advocates acquired important policing powers and judicial authority on ecclesiastical properties during this period. This undermines the typical scholarly argument that Carolingian advocates were a different phenomenon than subsequent types of advocates, as these East Frankish advocates already had responsibilities that most later advocates would continue to have into the eighteenth century.