Tenn. Code § 34-6-308
No person, school official, or health care provider who acts in good faith reliance on a power of attorney for care of a minor child to enroll the child in school or to provide medical, dental, or mental health care, without actual knowledge of facts contrary to those authorized, is subject to criminal liability or to civil liability to any person, or is subject to professional disciplinary action, for that reliance. This section shall apply even if medical, dental, or mental health care is provided to a minor child or the child is enrolled in a school in contravention of the wishes of the parent with legal custody of the minor child, as long as the person, school official, or health care provider has been provided a copy of an appropriately executed power of attorney for care of a minor child, and has not been provided written documentation that the parent has revoked the power of attorney for care of a minor child.
T.C.A. § 34-6-308