N.C. Gen. Stat. § 66-65
Wherever any person, firm, or corporation, engaged in the business of merchandising any articles whatsoever, shall require of its agents, solicitors, salesmen, representatives, consignees, or peddlers, or other persons selling or handling its merchandise, as a condition precedent to selling or handling any of the merchandise of said person, firm, or corporation, that such agents, solicitors, salesmen, representatives, consignees, or peddlers should furnish and provide a bond or guaranty or indemnity contract guaranteeing the full and faithful accounting of moneys collected from such merchandise, such bond or indemnity contract shall state specifically therein the maximum amount of money or other liability which the principal and the sureties or guarantors thereof undertake thereby to pay in event of default of said bond or indemnity or guaranty contract; and said bond or indemnity or guaranty contract shall also state specifically the period of time during which liability may be incurred on account of any default in said bond or indemnity or guaranty contract.
Any bond or indemnity or guaranty contract which does not comply with the provisions of this section shall be null and void and no action may be maintained against the surety or guarantor to recover any sum due thereon in any court of this State.
N.C. Gen. Stat. § 66-65