Objective: Social beings constructive elements of social relations of people with each other. peopele necessary to meet basic needs, the establishment of contractual relations tried to strengthen these relationships; The need for social order and the stability of commercial transactions conteract that people make, requires that contracts to prevent possible distortions and instability. Methodology: The rights of the manufacturer of the community as well as the principles and constituent elements of contracts, as well as wisdom and logic on the part of trade relations, the interest of the conflict and each other, maslaha the need to conserve contractual relationships and the interest of protecting the rights of the constituent elements of contracts. Results: Considering the above, there are three general rules about the mistake in the contract, should be considered mistake that harm the unity of intent and match offer and acceptance, prevents the formation of the contract. Conclusion: Since in this case, there is no sign of the doubt in its invalidity and where to apply the theory remains wrong errors in completed sub- theme wedding, the wedding will be cucumber, such an error is not related.
