What document accompanies an order and serves as the vendor's delivery slip?

The correct answer is the delivery note. A delivery note is a document that accompanies an order to confirm that the goods have been dispatched and provide information about the contents of the delivery. It serves to ensure that the recipient can verify that they have received the correct items as per the purchase order.

In the context of supply chain management and inventory, a delivery note often details the quantities and types of products delivered, confirming that the delivery aligns with what was ordered. It's an essential part of the receipt process, making it easier for both the vendor and the recipient to track inventory and confirm that all order details were fulfilled accurately.

A receipt, in contrast, is typically generated after a transaction has been completed, serving as proof of payment rather than as a delivery confirmation. A purchase order is a document sent from a buyer to a seller requesting the purchase of goods or services, while an invoice is a request for payment that is usually sent after the goods or services have been delivered.