705 ILCS 305/11
In other than single county circuits, where the sheriff serves the summons provided for in this Act it shall be the duty of the sheriff to execute the summons by reading the same or delivering a copy thereof to, or at the usual place of abode of, each of the persons directed to be summoned to constitute the jury as aforesaid, and to make return thereof on or before the return day, to the clerk of the court in which said jurors are to serve, with an endorsement thereon, certifying on whom it has been executed, and the time when; and in default of so doing, such sheriff or other officer shall be considered as guilty of a contempt, and may be fined, for the use of the proper county, in any sum not less than $10 nor more than $200; and it shall be the duty of the court, upon the return of such summons, to inquire into the cause of any failure to serve any such juror, and unless he shall find that the sheriff has used proper diligence to serve such juror, he shall inflict the fine aforesaid. In a copy of said summons it shall not be necessary to enter the names and residences of all the jurors, but shall be sufficient to recite the name and residence of the person to be served by such copy, and adding thereto: Among others, as set forth in the original summons.
705 ILCS 305/11