The author hypothesizes that the appearance of the manifest, purposeful lie in the transference indicates a regressive phenomenon of psychotic quality that corresponds to the concept of psychotic transference or illusory transference. In such transferences the patient eludes by various means any realistic attachment to the therapist who serves only as a screen on which are projected inner contents—the ones the patient is psychotically relating to. Consequently, the suspicion of the lie in the transference can be considered the harbinger of the emergence of psychotic contents. A detailed clinical example is given to demonstrate this problem.