Tennessee Code Title 66. Property § 66-29-108

(a) Except as otherwise provided in § 66-29-113, property held in an account established under title 35, chapter 7, is presumed abandoned if it is unclaimed by or on behalf of the minor on whose behalf the account was opened three (3) years after the later of:

(b) If the custodian of the minor on whose behalf an account described in subsection (a) was opened does not receive communications from the holder by first-class United States mail, the holder shall attempt to confirm the custodian's interest in the property by sending the custodian an electronic mail communication not later than two (2) years after the custodian's last indication of interest in the property. If the holder receives notification that the electronic mail communication was not received, or if the custodian does not respond to the electronic mail communication within thirty (30) days after the communication was sent, the holder shall promptly attempt to contact the custodian by first-class United States mail. If the mail is returned undelivered to the holder by the United States postal service, the property is presumed abandoned three (3) years after the later of:

(c) When the minor on whose behalf an account described in subsection (a) reaches the age required for transfer to a minor of custodial property under applicable law, the property in the account is no longer subject to this section.