You need to get something from the Court called an "Order for Alternate Service," which allows you to serve your ex via alternate means, such as posting the Complaint for Divorce on the door of his last-known address. In order to get the Order for Alternate Service, you will need to provide the Judge with a verified list of every date and time your process server tried to serve your ex, along with written verification from the Post Office of your ex's last listed address with them, and written verification from the Secretary of State as to your ex's listed address with them as well.
Answered on Sep 30th, 2013 at 4:29 PM