In an action or proceeding against an unincorporated nonprofit association, a summons and complaint or other process may be served on an agent authorized by appointment to receive service of process or a manager of the association or in any other manner authorized by the law of this state.
Service of process
Ohio Rev. Code Ann. § 1745.14, under Chapter 1745 | Uniform Unincorporated Nonprofit Association Act.
Ohio Rev. Code Ann. § 1745.14