(f)(1) If a court is satisfied, by affidavit or testimony, that, after reasonable efforts in good faith, a petitioner could not identify a parent or could not effect service on a parent, the court shall order service through notice by publication as to that parent.

To: (Father's name) To: (Mother's name) To: Unknown parent

“You are hereby notified that an adoption case has been filed in the circuit court for (county name), case no. (number). All persons who believe themselves to be parents of a (male or female) child born on (date of birth) in (city, state) to (mother's and father's names and dates of birth) shall file a written response. A copy of the show-cause order may be obtained from the clerk's office at (address) and (telephone number). If you do not file a written objection by (deadline), you will have agreed to the permanent loss of your parental rights to this child.”