N.C. Gen. Stat. § 58-74-5
Any person required to give a bond or undertaking, or required to enter into a recognizance for his appearance at any court, in any criminal proceeding, or for the security of any costs or fine in any criminal action, may also execute a mortgage on real or personal property of the value of such bond or recognizance, payable to the State of North Carolina, conditioned as such bond or recognizance would be required, with power of sale, which power shall be executed by the clerk in whose court said mortgage is executed, upon a breach of any of the conditions of said mortgage.
No such mortgage on real property executed for the security for costs or fine shall allow a longer time for payment of said costs or fine than six months from the execution thereof, and no mortgage on personal property a longer time than three months, except in cases of appeal, when the time allowed shall be counted from the date of the final decision in the cause.
All legitimate expenses of sale, which shall only be made after due advertisement according to law, shall be paid out of the proceeds of the sale.
N.C. Gen. Stat. § 58-74-5