The insurance risk is variable and cannot be described as constant; as there are accidental or temporary changes caused by the insured's action or caused by circumstances that he does not want to enter into, and these changes lead to a change in the effects that result from the change in the insurance risk, and therefore lead to an imbalance in the contractual balance between the parties, and that the insured notifies the insurer ( the insurance company), so the latter changes the value of premiums in case the insured risk changes, decreases or disappears, and if the risk changes decreases or disappears, it is possible that at the time of conclusion of a contract insurance or during the period of its validity, which leads to reducing the percentage of chances of its occurrence or seriousness, as this affects the survival of the contract from Maintaining the contract as it is and with the same conditions, reducing insurance premiums or canceling the contract.
Ibrahim et al. (Sun,) studied this question.