论未履行代物清偿合同的立体法权构建

On the three-dimensional construction of legal rights of non-performance contract of datio in solutum

司法实务界及理论界对未履行代物清偿协议持不同意见,我国的合同变更制度对其适用亦存在困难。在编纂民法分则合同编时,应肯定其诺成性,参考债之履行、更改、新债抵旧等对该制度进行立体化的法权设计。在新旧债关系上宜采取并存说及履行共同消灭说,而在新债的瑕疵责任担保问题上则应参考原债务的性质而定。

Judicial practice and theoretical circles hold different opinions on the non-performance contract of datio in solutum.There are difficulties in the application of the change contract system of China.When compiling the contract of the specific provisions of civil code,we should affirm its promissory nature and design the three-dimensional legal rights in consideration of the performance of debt,the modification of debt,the new debt for the old.In relations between old and new debt,we should adopt the coexistence view and the theory of performance to joint extinction.The liability of the defective warranty should be consistent with the nature of the original debt.