N.C. Gen. Stat. § 58-86-90
Except for the applications of the provisions of G.S. 110-136, and in connection with a court-ordered equitable distribution under G.S. 50-20, the pensions provided are not subject to attachment, garnishments or judgments against the firefighter or rescue squad worker entitled to them, nor are any rights in the fund or the pensions or benefits assignable. Notwithstanding any provisions to the contrary, any overpayment of benefits or erroneous payments to a member in a State-administered retirement system, the Disability Salary Continuation Plan, or the Disability Income Plan of North Carolina, including any benefits paid to, or State Health Plan premiums or claims paid on behalf of, any member who is later determined to have been ineligible for those benefits or unentitled to those amounts, may be offset against any retirement allowance, return of contributions, or any other right accruing under this Article to the same person, the person's estate, or designated beneficiary.
N.C. Gen. Stat. § 58-86-90