Tenn. Code Ann. § 18-1-103

Each clerk of a court must also, before entering on the duties of the office, take an oath to support the constitutions of the United States and of this state, and to execute the duties of the office without prejudice, partiality or favor, to the best of the clerk's skill and ability; also, that the clerk has neither given nor will give to any person any gratuity, gift, fee or reward in consideration of the clerk's support for the office, and that the clerk has neither sold nor offered to sell, nor will the clerk sell, the clerk's interest in the office.