Tennessee Code Title 6. Cities and Towns § 6-54-305

Any municipality or metropolitan government having a city or metropolitan court is empowered to permit by ordinance service of process through the use of registered mail or certified mail, addressee only, return receipt requested, in lieu of personal service of process in an action of debt involving nonpayment of any ticket or citation issued for any nonmoving traffic violation. This section shall only apply to municipalities having a population of thirty-two thousand (32,000) or more, according to the 1970 federal census or any subsequent federal census.