A broad interpretation of the dissolving condition indicates that it is a condition realization of which revokes undertaking(s) between the obligor and the obligee and cancels the contract or other similar legal instruments from the beginning (with a retroactive effect). There is no express legal text on the rule of dissolving condition in domestic standing laws. This has given birth to diversified reasoning by the legal experts. Moreover, in legal terms, the approach followed by Imamiyah jurists vis-à-vis this legal institution is not identical so that some consider it problematic  based on such evidences as principle of definitiveness of conditions, inconsistency of dissolving condition with requirement of nature of condition and lack of legality of evidences on conditions. On the contrary, some believe in the soundness of the institution of dissolving condition based on the legality of the evidences on conditions. This paper is devoted to analysis of consequent opinions and approaches of experts to finally put forth its selected viewpoint on feasibility of soundness and use of such institution in Iranian law and Imamiyah jurisprudence and prove legal soundness of its application on attachment of Articles 232 and 233 of Civil Law to Articles 10 and 975 of the same law. However, it seems that the generality of evidences on conditions prove legality of conditions in creating or destroying the legal effects.