Except when it is otherwise provided, the circuit court of any county or city, or the clerk of any such court, or his duly qualified deputy, in his office, shall record any such writing as to any person whose name is signed thereto with an original signature, when it shall have been acknowledged by him, or proved by two witnesses as to him in such court, or before such clerk, or his duly qualified deputy, in his office, or the manner prescribed in Articles 2 (§ 55.1-612 et seq.), 3 (§ 55.1-616 et seq.), and 4 (§ 55.1-624 et seq.). When such writing is signed by a person acting on behalf of another, or in any representative capacity, the signature of such representative may be acknowledged or proved in the same manner.