Transfer contract and assignment contractual position from the transferor to the transferee would cause the base contract party come out from the basic legal relationship and another person as deputy be placed in the contractual position of assignor. In the voluntary transfer unlike involuntary transfer, the contract party directly with the consent of the other party assign to the third party all rights and obligations arising from the original contract. So, transferor coming out from the base contract and transferee is placed in his position and in addition to take benefits from all rights and privileges created for the transferor, as he is obliged to perform all the duties and obligations under the contract (with the exception of personal commitments) for the base contract non-variable party. In this kind of transfer, transfer of contract is possible when conditions are provided and in the absence of any conditions, the voluntary transfer faced with a serious problem and it is not possible.