Responsible staffing agencies like Robert Half need to protect their reputation, including prescreening clients in various ways. A smart recruiter will look for a history of unexplained employee turnover, previous sexual harassment accusations, stories of discrimination, poor health and safety records, and consistently lousy employee reviews. When meeting with a client for the first time and they brag about burning through multiple staffing agencies, this is a definite warning sign. Show the interviewer that you will never put the reputation of Robert Half on the line to land a job order.