Illinois Additional Proof of Delivery 908.1 is a form that is used to provide additional proof of delivery for businesses located in Illinois. It is a form that is used to document the delivery of goods, products, or services by a third-party carrier. It includes information about the shipper and the recipient, the date of delivery, the carrier, and the specific items that were delivered. There are two types of Illinois Additional Proof of Delivery 908.1 forms, the "Verified" form and the "Unverified" form. The Verified form requires that the carrier, or a representative of the carrier, sign the form to confirm that the items were delivered. The Unverified form does not require the carrier's signature and is used for deliveries that are not time-sensitive. Both forms are used to provide additional evidence of delivery in order to protect the rights of the shipper and the recipient.