30 ILCS 320/1

As used in this Act

(a) "Public Security" means a bond, note, certificate of indebtedness, or other obligation for the payment of money, issued by this State or by any of its departments, agencies, or other instrumentalities or by any of its public corporations, political subdivisions, municipal corporations, or other governmental units.

(b) "Instrument of Payment" means a check, draft, warrant, an order for the payment, delivery, or transfer of funds.

(c) "Authorized Officer" means any official of this State or any of its departments, agencies, or other instrumentalities or any of its public corporations, political subdivisions, municipal corporations, or other governmental units whose signature to a public security or instrument of payment is required or permitted.

(d) "Facsimile Signature" means a reproduction by engraving, imprinting, stamping, or other means of the manual signature of an authorized officer.