Tennessee Code Title 36. Domestic Relations § 36-1-122

(b)(1) After the final order of adoption is entered, no party to an adoption proceeding, nor anyone claiming under such party, may later question the validity of the adoption proceeding by reason of any defect or irregularity therein, jurisdictional or otherwise, but shall be fully bound by the order, except for such appeal as may be allowed by law.

(2) In no event, for any reason, shall an adoption be overturned by any court or collaterally attacked by any person or entity after one (1) year from the date of entry of the final order of adoption by a court of competent jurisdiction. This provision is intended as a statute of repose.

(3) The failure of the clerk of the court, the department, a licensed child-placing agency, or a licensed clinical social worker to perform any of the duties or acts with the time requirements of this part shall not affect the validity of any adoption proceeding.

(4) After a final order of adoption is entered, an order shall not be entered requiring visitation or other contact between an adopted person and a biological parent or other related person unless the order is entered pursuant to § 36-1-145.