Tennessee Code Title 20. Civil Procedure § 20-2-202

(a) Any unincorporated association or organization, whether resident or nonresident, including nonresident partnerships and nonresident trusts, doing or desiring to do business in this state by performing any of the acts for which it was formed, shall, before any such acts are performed, appoint an agent in this state upon whom all process may be served, and certify to the clerk of the circuit court of each county in which the association or organization desires to perform any of the acts for which it was organized the name and address of the process agent.

(c) Service upon the process agent appointed pursuant to this section, or upon the secretary of state if no process agent is appointed, shall be legal and binding on the association or organization, and any judgment recovered in any action commenced by service of process, as provided in this section, shall be valid and may be collected out of any real or personal property belonging to the association or organization.