735 ILCS 5/2-409
Persons having claims against the plaintiff arising out of the same or related subject matter may be joined as defendants and required to interplead when their claims may expose plaintiff to double or multiple liability. It is not a ground for objection to interpleader that the claims of the several claimants or the titles upon which their claims depend do not have a common origin or are not identical, or are adverse to or independent of one another, or that the plaintiff avers that he or she is not liable in whole or in part to any of or all the claimants. A defendant under similar circumstances may obtain like relief by counterclaim. The provisions hereof are not a limitation upon the joinder of parties or causes of action.
735 ILCS 5/2-409