Tenn. Code Ann. § 6-51-203

Upon approving deannexation by ordinance in accordance with § 6-51-201, a contracting municipality shall record the ordinance with the register of deeds in the county or counties where the deannexation was adopted or approved. The ordinance must include a detailed description of the deannexed territory, including, but not limited to, map and parcel numbers of all real property within the deannexed territory. A copy of the ordinance, map, and detailed description must also be sent to the comptroller of the treasury and the assessor of property for each county affected by the deannexation.