Tennessee Code Title 6. Cities and Towns § 6-21-507

(a) The city judge, in all cases heard or determined by such city judge for offenses against the corporate laws and ordinances, shall set and collect municipal court costs in accordance with § 16-18-304, shall levy and collect the litigation tax in accordance with § 16-18-305 and, in addition, shall add thereto one dollar ($1.00), as a tax on all such cases. The city judge shall certify to the chief of police for collection, all fines, costs, and forfeitures imposed by the city judge for offenses against the laws and ordinances of the city. Costs in favor of any person paid a fixed salary by the city shall belong to the city and be paid into its treasury. It is the duty of the city judge to collect and receipt for all fines imposed by the city judge, and the city judge shall render a monthly report to the board of commissioners of all costs and fines collected and of all assessed and uncollected.

(b) It is unlawful for any other person or officer to collect or receipt for such fines, costs, and recoveries, but the city judge may authorize the chief of police to collect and receipt for fines and costs.