Tennessee Code Title 40. Criminal Procedure § 40-11-138

(a) If the conditions of the bail bond have been performed and the defendant has been discharged from the defendant's obligations in the cause, the clerk of the court shall return to the bondsman the deposit of any cash. If the bail has been secured by real estate, the clerk of the court shall immediately prepare and forward to the register a written release of the deed of trust on the real estate. The costs of the release shall be paid by the defendant.

(c) If after the bond has been active and in effect for three (3) years and the state has failed to seek an original indictment before a grand jury against the defendant covered by the bond, the bond shall not be forfeited against the surety and shall not be included in the calculation of a professional bondsman's capacity, solvency, or otherwise negatively impact the surety involved.