Ill. Admin. Code tit. 47, § 355.304
The amount of a cash Donation shall be evidenced by a copy of the check or cashier's check from the Donor, evidence of a wire-transfer of funds by the Donor, or such other evidence of the provision of cash by the Donor that may be satisfactory to the allocating Agency.
(Source: Amended at 27 Ill. Reg. 14310, effective August 21, 2003)