Professional misconduct-especially misconduct involving client-worker boundary violations-generates serious costs for clinical social workers. It harms the very clients we aim to help; it frequently tarnishes the reputation of not only the individual social worker involved but also the face of the entire profession; and, it adds significantly to the overall costs of malpractice insurance. This paper defines the scope of the problem and provides support for understanding transference and countertransference as important contributors to prevention.