Tenn. Code Ann. § 32-1-110

A paper writing, written on or before February 15, 1941, appearing to be the will of a deceased person, written by the deceased person, having the deceased person's name subscribed to it, or inserted in some part of it, and found, after the deceased person's death, among the deceased person's valuable papers, or lodged in the hands of another for safekeeping, shall be good and sufficient to give and convey lands, if the handwriting is generally known by the deceased person's acquaintances, and it is proved by at least three (3) credible witnesses that they verily believe the writing, and every part of it, to be in the deceased person's hand.