Tenn. Code Ann. § 24-5-106: Denial of instrument by successor of decedent

If the party be deceased, the personal representative, or in case such representative refuses or fails to do so, any heir of the deceased, or other person, who is entitled to any part of the estate, either by will or by law, and who is or becomes a party to the suit, may make the denial under oath "according to the best of my personal knowledge, information and belief."