The role of the witness is very serious in the course of justice, to the extent that its accuracy to the extent that judicial decisions are accurate and fair, especially if it is evidence of a conviction, or an acquittal, the only one, and it is often the case, for example, issued by the US courts in 1987 alone, 78 thousand judicial sentences based only on the decision of the witnesses, and therefore interrupts the validity of these provisions and l fairness on the accuracy of witnesses and their efficiency. Hence the need to increase accuracy and efficiency, and psychology has played a leading role in achieving this increase; since the certificate mainly concerns purely psychological aspects, there is a crime of Calantbah and the recognition of merits, preserved in memory, then restored during the trial. The contribution of psychology in this area is not new, in 1893 the Bovini assessment was attempted by a witness, and the impact of the attempt to confuse and its insistence on this, between the researcher and a lawyer can either _ else _ pose questions of justice in questioning the testimonies of witnesses and showing them as if they were contradictory, suggesting ineffectiveness and stubbornness, the accuracy of the certificate. In 1896 he became interested in the world of German cars; Notzenj; the impact of the media on the accuracy of the certificate, and in 1901 we attempted; Stern, revealed the emotional impact of the witness's case on the efficiency of the restorer when he saw the facts of a crime, and in 1906 published Stern; same scientific journal entitled, Psychology and jurisdiction of the certificate, has dealt with articles that have been published research: the role of leading questions in the distortion of the certificate, and the role of attitudes and prejudices in witness bias, and the factors that reduce the efficiency of child and elderly witnesses. In 1908, he published Hugo Monstrberg's book on the certificate scene confirming the importance of benefiting from psychological research in the field of the certificate, and in 1914 Monstrberg also published an article on the certificate