Tenn. Code Ann. § 29-35-110: Suit on relation of private individual

(a) The suit is also brought on the information of any person, upon such person giving security for the costs of the proceedings, to be approved by the clerk of the court in which the bill is filed.

(b) When the suit is brought at the relation of a private individual, it shall be so stated in the bill and proceedings, and such individual is responsible for costs in case they are not adjudged against the defendant.