Warm lists A term referring to the responsibility of a counselor or therapist to inform third parties or authorities if a client poses   a threat to himself or herself or to another identifiable individual. Legal duty to warn was established in the case of   Tarasoff v. Regents of the University of California 1986 where a therapist failed to inform a young woman and her parents   of specific death threats made by a client. The young woman and man was subsequently killed and their family sued the therapy provider. Duty to warn gives counselors and therapists the right to breach confidentiality if a client poses a risk to another person.