What is the document sent to site by a materials supplier along with an order?

The document sent to a site by a materials supplier along with an order is typically called a "packing slip" or "delivery note." This document details the materials included in the shipment, including quantities, descriptions, and any relevant order numbers. It serves as a packing checklist and is used for verifying that the correct items have been delivered. Often, it may also include information about the supplier and delivery terms.