Under the general rule in the proof of legal actions in the Syrian law on evidence in writing, shall not be proof of testimony only within the limits of quantitative quorum for the certificate as stipulated Syrian Evidence Act. However, evidence of proof the law has been passed to testify if required commitment exceeded the value of proven quantitative quorum of the certificate; if a literary mind if found without written guide. This study aims to indicate what the literary inhibitor; and by clarifying cases of literary inhibitor, which allows proof of testimony, also aims to demonstrate the power of the judiciary to appreciate the literary inhibitor, and the consequences of proven literary inhibitor and how to prove.