Recent investigations show that the issue is much more complicated than it seems.The papillary lines of the skin on human fingers and palms are considered to be unique and unchangeable during all the life. Fingerprint identification rests on a simple anatomical feature of primates. The skin of their soles, palms, and, most importantly, fingers contains raised ridges and glands that secrete oil to keep the skin supple. Ridge patterns form in utero and do not change throughout a person’s life (Faulty Fingerprints). Experts classify ridges based on their overall pattern, whether they form concentric circles if they loop horizontally or vertically across the fingertip, etc (). However, such a hypothesis is not scientifically proved, notwithstanding that it is widely used in practice. Moreover, the serious evaluation of the credibility of personality identification by means of fingerprints has never been held. By default it is considered to be 100%, however, there are scientifically proved data, which states that such credibility is only 98%. It means that on average every 50th case of personality conviction based on fingerprints identification can be mistaken. It appears that widespread opinion about the uniqueness of the drawing on the fingers is supported not by all the scientists. If their doubts are relevant, the appropriateness of many established rules, which were considered unshakable, is also rather doubtful. At the same time, the safety system of many states is based on the belief in the absolute uniqueness of fingerprints. Since 2004 all the foreigners who enter the United States have to go through the procedure of fingerprinting in order to prevent territory penetration by criminals and evil-doers.