Whenever the proceeds of, or payments under, a life or disability insurance policy or annuity contract, heretofore or hereafter issued, become payable in accordance with the terms of such policy or contract, or the exercise of any right or privilege thereunder, and the insurer makes payment thereof in accordance with the terms of the policy or contract or in accordance with any written assignment thereof, the person then designated in the policy or contract, or by such assignment, as being entitled thereto shall be entitled to receive such proceeds or payments and to give full acquittance therefor; and such payments shall fully discharge the insurer from all claims under the policy or contract, unless, before payment is made, the insurer has received at its home office written notice by, or on behalf of, some other person that such other person claims to be entitled to such payment or some interest in the policy or contract.