Miss. Code § 83-11-105
In the event the owner or operator of the uninsured vehicle causing injury or death is known and action is brought against said owner or operator by the named insured as defined by said policy, then a copy of the process served upon the owner or operator shall also be served by the circuit clerk mailing, registered mail, a copy of the process to the insurance company issuing the policy providing the uninsured motorist coverage as prescribed by law.
If the owner or operator of any motor vehicle which causes bodily injury to the insured be unknown, the insured or someone on his behalf, or in the event of a death claim, someone on behalf of the party having such claim in order for the insured to recover under the endorsement, shall report the accident as required by Section 63-15-9, Mississippi Code of 1972.
Miss. Code § 83-11-105