Section 815 ILCS 620/402 - Right of cancellationEach party's right of cancellation of the contract shall be maintained:
(a) Notwithstanding any contractual provision to the contrary, the invention developer and the customer shall each have the right to cancel a contract for invention development services, for any reason, at the time within 7 days of the date the cancelling party receives a fully executed copy of the contract. Cancellation shall be effected by written notice mailed or delivered to the invention developer or the customer. If said notice is mailed, it must be postmarked by midnight of the last day of the cancellation period unless such last day falls on a Sunday or a holiday recognized in Illinois in which case it must be postmarked by midnight of the next following business day. If the notice is delivered, it must be delivered by the end of the last day of the cancellation period and during normal business hours, unless the last day falls on a Sunday or a holiday recognized in Illinois in which case delivery may be made during the next normal business day. Within 5 business days after mailing or delivery of such notice of cancellation by the invention developer or receipt of such notice of cancellation by the customer, the invention developer shall return to the customer, by mail, all moneys paid and all materials provided by the customer. Within 5 business days after mailing or delivery of such notice of cancellation by the customer or receipt of such notice of cancellation by the invention developer, the invention developer shall return to the customer, by mail, all moneys paid and all materials provided by the customer.(b) The provisions of subparagraph (a) of Section 402 shall apply to every contract executed between an invention developer and a customer. Each such contract shall contain the following statement in type bolder than that of the surrounding text immediately above the place at which the customer signs the contract: "The 7 day period during which you may cancel this contract for any reason by mailing or delivering written notice to the other party will expire 7 days from the date you receive a fully executed copy of this contract. If you choose to mail your notice, it must be placed in the United States mail properly addressed first-class postage prepaid and postmarked before midnight of that date. If you choose to deliver your notice to the other party directly, it must be delivered by the end of business on that date."