This research investigated predictors of reported complaints by volunteers in an ombudsman program in nursing facilities using questionnaire data from 633 volunteers and 1,886 records. Age, role orientation of volunteers, profit-nonprofit status of facilities, informal ties with facility staff, and volunteers' views of their work experiences were examined in relation to the number of complaints. A unique feature of the research was linking characteristics of volunteers and perceptions of their experiences with an objective indicator of their actual practices. Tests of three hypotheses indicated that identification with advocacy, negative perceptions of work experiences, and fewer informal relationships with nursing facility staff increased reported complaints. Implications for practice are noted.