The expansion of urbanization, raised raised the issue of housing and construction development as a necessity. In this regard, the legislator, by creating a contract called pre-sale of buildings, in addition to facilitating access to affordable housing, helped finance construction projects. However, the pre-sale contract is like a sapling that simply plants it without taking measures for its care and management, dries it up. the lack of a management monitoring model in the building pre-sale process has been a serious issue in the pre seller-pre buyer relationship which has created many problems. Therefore, the question is how to achieve a legal mechanism for efficient management of the pre-sale process. To answer this question, this article, based on the method of desk research and referring to documents in collecting information, along with descriptive analytical researching method, first of all, considered the issue of Payment supervision and arbitration in disputes as the most challenging issues in buyer-seller relations. And in the framework of the study of the role of the notary in the pre-sale process in foreign law and the opinions of experts in the field of the capacities of the notary system, has presented a model to answer this question based on the rationale of the agency issue in economics and using the theory of contracting project management centered on the role of the notary.