Indiana Code Title 33. Courts and Court Officers § 33-34-3-8

Sec. 8. (a) Upon the filing of a complaint, service of original process shall be attempted by personal service of the summons and complaint on the defendant, which may include leaving a copy of the service at the last known place of residence of the party if the process server properly describes on the return the residence, noting any of its unique features, and mailing by first class a copy of the service without charge to the party at the same last known place of residence.

(b) If service cannot be made in this manner, service of process shall be made in an alternate manner as provided by the Indiana Rules of Civil Procedure.

(c) Subsequent service of process, other than that originally served upon filing of the complaint, may be made by registered or certified mail or another manner authorized by the Indiana Rules of Civil Procedure.