package slip definition refers to a document that is included with a shipped package to provide important details about the contents. The package slip typically includes information such as the recipient’s address, the sender’s address, an itemized list of the products being shipped, and any applicable order numbers or tracking information. Package slips are essential for both customers and businesses, ensuring the proper handling of orders and providing a reference for returns or exchanges. E-commerce companies use package slips to streamline order fulfillment and customer service.