Tennessee Code Title 66. Property § 66-29-128

(a) Any holder of property not yet presumed abandoned under this part may enter into agreements as may be necessary to ascertain the whereabouts of the apparent owner; provided, that costs associated with such agreements must not be deducted from the property or charged to the owner.

(b) Except as otherwise provided in subsection (c), the holder of property presumed abandoned shall send notice that complies with § 66-29-129 to the apparent owner in a form approved by the treasurer, by first-class United States mail, not more than one hundred eighty (180) days, nor less than sixty (60) days, before filing the report under § 66-29-123 if:

(c) If an apparent owner has consented to receive electronic mail communications from the holder, the holder shall send the notice described in subsection (a) both by first-class United States mail to the apparent owner's last known mailing address and by electronic mail, unless the holder has reason to believe that the apparent owner's electronic mail address is not valid.