What is the packing slip refers to a document that accompanies a shipment and lists the items included in the package. A packing slip typically includes the names, quantities, and descriptions of the products inside, but it does not contain pricing or payment information. Packing slips are important for both the sender and the recipient to verify that the correct items were shipped and received. They are commonly used in e-commerce and wholesale shipments to ensure accuracy and facilitate returns or exchanges if necessary. A packing slip is different from an invoice, which includes pricing details.