Double insurance and right of contribution

Double insurance is provided when several insurers cover the same property against identical risk with respect to the same period. Unlike other legal systems, Iran act insurance does not have any explicit provision about status of double insurance and in this respect different opinions have been raised by legal writers. However, assuming the validity of multiple insurance, this issue is brings up that how the insured is entitled to claim against insurers. Some believe that each insurer will be liable for a rateable proportion only, and some other have an opinion that the insured may recover the full amount of his loss from whichever insurer or insurers he chooses. It seems, that just solution is final devided of liability between insurers and in the other word is the right of contribution that is defined as the right of insurers who have paid a loss to recover a proportionate amount from other insurers who are also liable for the same loss.