No effect until death

Tenn. Code Ann. § 35-12-107, under Uniform Transfer on Death Security Registration.

Tenn. Code Ann. § 35-12-107

The designation of a TOD beneficiary on a registration in beneficiary form has no effect on ownership until the owner's death. A registration of a security in beneficiary form may be cancelled or changed at any time by the sole owner or all then surviving owners without the consent of the beneficiary.