815 ILCS 345/6
No fine print or prints shall be knowingly offered for sale or sold in this state by any person, at wholesale or at retail, unless a written invoice or receipt for the purchase price or a certificate furnished to the purchaser clearly and conspicuously discloses all of the relevant informational details required by Section 7.
If the seller disclaims knowledge as to any relevant detail referred to in Section 7, he shall so state specifically and categorically with regard to each such detail to the end that the purchaser shall be enabled to judge the degree of uniqueness or scarcity of such print or prints. Describing the print as a "reproduction" eliminates the need to furnish further informational details unless it was allegedly published in a signed, numbered, or limited edition, or any combination thereof, in which case all of the informational details are required to be furnished.
815 ILCS 345/6