N.C. Gen. Stat. § 58-70-75: Creditor may request return of accounts.

The written request of a creditor or forwarder for the return of any account which is not in the actual process of collection shall be complied with by the permit holder in writing within a reasonable length of time, but in any event not to exceed 60 days. All valuable papers furnished by the creditor or forwarder in connection with the account shall be returned. (1979, c. 835.)