Illinois Pt1-Instructions for Getting Started Proof of Delivery is a form created by the Illinois Department of Revenue for businesses to use when collecting proof of delivery for taxable items. It must be filled out by the seller and presented to the buyer at the time of delivery. The form includes important information such as the seller's name, address, and Illinois Identification Number, as well as the buyer's name, address, and Taxpayer Identification Number. In addition, it contains the item description, quantity, and sales price, as well as the date and time of delivery. The buyer must sign the form to acknowledge receipt of the taxable items. There are two types of Illinois Pt1-Instructions for Getting Started Proof of Delivery: one for tangible personal property and one for services.