If Ill. law applies, does the following apply?
Taken from
http://www.megalawserve.com/states/il.php3
735 ILCS 5/2-203. Service on individuals.
(a) Except as otherwise expressly provided, service of summons upon an individual defendant shall be made
(1) by leaving a copy of the summons with the defendant personally,
(2) by leaving a copy at the defendant's usual place of abode, with some person of the family or a person residing there, of the age of 13 years or upwards, and informing that person of the contents of the summons, provided the officer or other person making service shall also send a copy of the summons in a sealed envelope with postage fully prepaid, addressed to the defendant at his or her usual place of abode, or
Does that mean either or? Then perhaps someone at home is dumb enough to take the service (not necessarily the person) with a certified RRR might be sufficient?
Definitely check with a local lawyer, as I am not local, nor a lawyer.
Best of luck!