N.C. Gen. Stat. § 135-17
In the event of the death of a member or beneficiary not survived by a person designated to receive any return of accumulated contributions or balance thereof, or in the event that the Board of Trustees shall find that a beneficiary is unable to care for his affairs because of illness or accident, any benefit payments due may, unless claim shall have been made therefor by a duly appointed guardian, committee or other legal representative, be paid to the spouse, a child, a parent or other blood relative, or to any person deemed by the Board of Trustees to have incurred expense for such beneficiary or deceased member, and any such payments so made shall be a complete discharge of the liabilities of this Retirement System therefor.
N.C. Gen. Stat. § 135-17