With the increasing development of the shipbuilding industry in the global arena, the need for the presence of foreign companies in this field and especially investment in it was felt more than ever. The benefits of the presence of foreigners and the existence of sanctions against Iran gave special importance to how the contract was concluded. However, considering that the contract is considered an indefinite contract and its limits and limits are agreed upon between the parties according to the freedom of will (Article 10 of the Civil Code of Iran). In this research, we considered the conditions of the representative and the duties of its parties against the third party to be important and examined. The authors have tried to process the subject by using a descriptive-analytical research method and library data collection method. What was obtained from this research is the need to pay attention to the representative's behavior and the limits of authority granted to the representative by the principle. Considering all the aspects mentioned in this research, a relatively reliable contract can be concluded.
