(A) Individuals. Process may be served on a resident or nonresident individual by (1) delivering a summons and a copy of the complaint to the defendant personally; or (2) sending a summons and a copy of the complaint by registered or certified mail, return receipt requested, and delivery restricted to the addressee. Service is made when the defendant acknowledges receipt of the mail. A copy of the return receipt signed by the defendant must be attached to proof showing service under subrule (A)(2)