In Tennessee, a witness is used during notary services when the signer lacks acceptable identification, specific legal documents (like wills) require them, or to prevent document fraud. A "credible witness" can vouch for a signer's identity, and witnesses must be 18+, impartial, and not beneficiaries.

In Tennessee, a notary must verify a signer's identity using a current, government-issued photo ID, such as a state driver's license, state ID card, U.S. passport, or military ID. The ID must be unexpired or issued within the past 5 years. Other acceptable forms include Resident Alien cards (green cards).