Fregoli syndrome is a rare psychological disorder in which the person affected believes that different people around him or her are in fact same but appear different because they are in disguise. It is also called delusional misidentification syndrome where strangers are perceived as familiar people in disguise. It can be said that it is a delusion of over-identification, in contrast to Capgras syndrome, which is a case of under-identification. The disorder was named after an Italian actor, Leopoldo Fregoli, who was famous for his ability to impersonate famous political personalities. It is believed to be caused by serious injury to parietal and temporal regions of the brain or neural pathways.