Tennessee Code Title 6. Cities and Towns § 6-55-101

(a) The collector of every municipal corporation shall collect and pay over to the treasurer, on the first Monday of January and July, each year, all taxes, fines, and forfeitures due and owing to the same; and, on failure, shall be liable for the amount of such collector's delinquency, with costs, on motion before the circuit court.

(b) Notwithstanding any charter provision to the contrary, the powers of the county trustee of any county having a metropolitan form of government and a population of over four hundred fifty thousand (450,000), according to the 1990 federal census or any subsequent federal census, shall include the power to collect real and personal property taxes or tax equivalents and all merchants' ad valorem taxes that have been delinquent for more than six (6) months as well as any interest and penalties thereon, if such power is given to the county trustee by ordinance of the legislative body of such a county.