Non-Delimitation of Incompetency Denotations in Jurisprudence and Law and the Contradiction of some of its Titles to the Law on Non-Litigious Matters

“Incompetency” literally means prohibition and it is commonly used to point to an individual being deprived of his rights to take possession of his properties and his financial rights by the law. And, in other words, the incompetents are the individuals that do not possess “the legal capacity to enjoy a certain right” and are deprived from taking possession of their properties and if such a taking possession of the properties by an incompetent occurs, it is invalid and cannot take effect.In the legal system of Islam, the individual with a sort of a disease that features certain types of conditions leading to the weakness of the mind or insanity is called an incompetent. But the example cases of the incompetent and incompetency have not been delimited in the jurisprudence and law. Thus, the investigation of the instruments of incompetency from the perspective of the jurisprudential texts and the statutory provisions via offering an assumption indicating the non-delimitation of the incompetency instruments scope has resulted in conflicts in the non-litigious affairs law with the civil procedure, the necessity to rethink the causes of insanity as one instrument of incompetency in the civil law, the centrality of the incompetency for its setting the ground for the exertion of the law and the non-litigious affairs regulations as well as the incompetency of some patients with nervous diseases like hysterical conversion and dissociative hysteria and so forth. Therefore, conceptualizing the incompetency, the present study aims at assessing, then criticizing and investigating, the proofs offered by the proponents and the opponents of the incompetency of the patients with hysteria so as to consequently conclude an assumption regarding the hysteric patients’ incompetency and the relevant contradictions, if any, with the non-litigious matters law and civil procedure.