Service of notice. Violation notices and other orders
or notices referred to in this chapter shall be served on the owner
or one of the owner's executors, legal representatives, agents, lessees
or any tenant or other person occupying the premises or other person
having a vested or contingent interest in the premises, either personally
or by certified mail addressed to the last known address, if any,
of the owner or one of the owner's executors, legal representatives,
agents, lessees or other person having a vested or contingent interest
in the same, as shown by the last preceding completed record of the
Receiver of the Taxes or in the office of the County Clerk. If the
current name and address of the person upon whom an order may be served
is not on file, by posting a copy of the notice in a conspicuous place
on the premises and by mailing another copy to the premises, addressed
to the owner, lessor or his or her respective agent.