Ind. Code § 27-8-3-22
Any member of such corporation, association or society may name as his payee or beneficiary any person or persons, natural or artificial, permitted by the by-laws of such corporations, associations or society, or, if the by-laws thereof permit, the insurance of such member may be made payable to his estate. Any member of such corporation, association or society, naming as his payee or beneficiary any such person or persons, may make such designation either revocable or irrevocable, and the option which he elects to exercise shall be set out in and be made a part of his application for a certificate or policy of insurance. When the right of revocation has been reserved, or in case of the death of any payee or beneficiary under either a revocable or an irrevocable designation, the insured, subject to any existing assignment of the policy, may designate a new payee or beneficiary, with or without reserving the right of revocation, by filing written notice thereof at the home office of the corporation, association or society, accompanied by the policy for suitable endorsement thereon. No person who shall have been designated as a payee or beneficiary by the insured shall have or obtain any vested interest in the death benefits which may accrue in the event of the death of the insured until such death benefits shall have become due and payable upon the death of the insured.
IC 27-8-3-22