Extensive histories of complex developmental trauma and insecure attachment are widespread among people given a diagnosis of personality disorder in forensic settings, and are likely to be important predisposing factors that contribute to their offending behavior. In working with this population, it is important to bear this in mind, and helpful to formulate clients' challenging behaviors as a set of learned responses to perceived threat, or as survival strategies. Such an approach not only makes the interviewing process more effective, it also helps to avoid perpetuating destructive patterns of behavior and relationship between forensic clients and people in authority. We present seven principles for effective interviewing with this population; a) careful preparation; b) a constant focus on the therapeutic relationship; c) providing structure and containment; d) adopting a flexible approach; e) managing therapyinterfering behaviors; f) obtaining supervision; and g) adopting a whole-team approach.