Indiana Code Title 36. Local Government § 36-9-27-110

Sec. 110.  (a) Whenever this chapter provides for the mailing of a notice to owners of affected land, the notice shall be addressed to the owner at the owner's home address as last entered by the county auditor for property tax purposes.  If the owner is a railroad company or utility and is not assessed for taxes locally, the notice shall be addressed to the department of local government finance for forwarding to the railroad company or utility.  If the owner is a unit or a school corporation, the notice shall be addressed to the persons authorized by law to accept service of process in civil actions on behalf of that owner.  If the owner is the state, copies of the notice shall be addressed to the department or agency, if any, charged by law with the maintenance, supervision, or control over the state owned land that is affected.

(b) Whenever sections 54 through 65 of this chapter provide for the service of any document upon the attorney for a petitioner, the service shall be made by personally handing the document to the attorney, by leaving the document at the attorney's address, or by mailing the document to the address of the attorney as set forth in the petition.