[AvengerRam]

Depends on the wording of the policy.

If benefits are payable "upon death of the policy holder," there should be no obligation to repay if you are frozen post-death and then later brought back. I on the other hand, you are frozen prior to death, and later revived, the benefits would not vest upon being frozen.

If benefits are payable at "the end of the life of the policy holder," it could be argued that death, followed by freezing, is not the end, and therefore payment should not be made until such time as the policyholder reaches a state from which no revival could ever occur.