Illinois Additional Proof of Delivery 912.1 is a document that must be signed by both the shipper and the receiver to ensure that goods are received and accepted. This document is used as evidence in the event of a discrepancy between the two parties. There are two types of Illinois Additional Proof of Delivery 912.1: 1) Non-Bonded Form 912.1 and 2) Bonded Form 912.1. The Non-Bonded Form 912.1 is used for shipments that do not require the use of a bond, while the Bonded Form 912.1 is used for shipments that require a bond. Both forms of the document provide evidence to the shipper and receiver that goods have been received and accepted, and can be used to avoid potential disputes.