**By Whom Served.** A summons and complaint shall … be served by any person who is not a party and is not less than 18 years of age. When a summons and complaint are served by process server, an amount not exceeding that statutorily allowed to the sheriff for service of process may be taxed as recoverable costs in the action.
**Personal Service, Individuals.** …By delivering a copy of the summons and complaint to him personally.
**Substituted.** if service under subparagraph (1) (A) cannot be made with reasonable diligence, by leaving a copy … at the defendant’s usual place of abode with the defendant’s spouse or some other person of the defendant’s family above the age of 16 years who is willing to receive service, and [by thereafter sending a copy by first class mail to the defendant at the service address]. Service … is deemed complete on the 10th day after mailing.
**Corporations.** Upon a domestic or foreign corporation … by delivering a copy … to an officer, a managing or general agent, or to any other agent authorized by appointment or by law to receive service of process.
**Return of Service.** The person serving the process shall make proof of service thereon to the court promptly and in any event within the time during which the person must respond to the process. If service is made by a person other than a sheriff, such person shall make affidavit thereof…