Final answer:
Naming an additional person as the sole primary beneficiary ensures the direct transfer of benefits to that individual and helps prevent disputes among heirs or related parties.
Step-by-step explanation:
Naming an additional person as the sole primary beneficiary helps ensure that, upon the policyholder's death or the settlement of an estate, all the benefits of a policy or will are transferred to this individual without dispute. It is a clear legal designation that can preempt potential conflicts among heirs or related parties. This can be particularly important in situations where there is a complex family structure, in cases where the assets involved are substantial, or when the policyholder wants to specifically support an individual who might not be a natural heir.