Indiana Code Title 36. Local Government § 36-9-27-58

Sec. 58. (a) Within seven (7) days after the attorney for the petitioner is served with notice of a hearing under section 57(e) of this chapter, the attorney for the petitioner shall prepare a written notice setting forth:

(b) The attorney for the petitioner shall, within the seven (7) day period, mail a copy of the notice in a five (5) day return envelope to each owner named in the petition.

(c) The attorney for the petitioner shall have a copy of the notice published in accordance with IC 5-3-1.  The published notice shall be directed to whom it may concern and to the addressee on each letter that was mailed under subsection (b) and was returned undelivered.

(d) On or before the day of the hearing, the attorney for the petitioner shall file with the board affidavits showing the mailing of the notices under subsection (b) and the publication of notice under subsection (c).  The mailing and publication of the notice under this section constitute public notice to all owners of the pendency of the petition, whether or not they were individually named and notified, and are sufficient to give the board jurisdiction over those owners.