815 ILCS 105/13
Current through Public Act 103-593
If any such note, bond, bill, or other instrument of writing, shall be assigned before the day the money or property therein mentioned becomes due and payable, and the assignee shall institute an action thereon, the defendant may give in evidence at the trial any money or property actually paid on the said note, bond, bill, or other instrument in writing, before the said note, bond, bill, or other instrument in writing was assigned to the plaintiff, on proving that the plaintiff had sufficient notice of the said payment before he accepted or received such assignment.
815 ILCS 105/13