2017 Tennessee Code
Title 66 - Property
Chapter 23 - Authentication of Instruments by Witnesses
§ 66-23-104. One witness competent.
If all the subscribing witnesses are dead, insane, blind, or deaf and dumb, except one (1), that witness may prove the execution of the instrument before the clerk or deputy clerk of the county, the handwriting of the other witness being proved by some other person.