N.C. Gen. Stat. § 1-517

The Attorney General, before granting leave to a private relator to bring a suit to try the title to an office, may require two sureties to the bond required by law to be filed to indemnify the State against costs and expenses, and require such sureties to justify, and may require such proof and evidence of the solvency of the sureties as is satisfactory to him.