The importance of the law of contracts is increasing day by day, and before the emergence of disputes, the tendency to make a written contract in the context of preventive law is increasing day by day in order to prevent the possible conflicts that may arise. During the negotiation and finalization process, it provides legal support: – Contract of sale-Works and service contract-Floor construction contract-Rent agreement-Dealership and agency agreement-Knowhow and franchising agreement-License agreement-Leasing contract