A document that accompanies shipped merchandise, listing the contents, quantities, and details of items included in a specific shipment. Generated automatically by the WMS during the packing process, this document serves as both an internal picking verification tool and a customer reference for order contents.

Packing slips are critical for maintaining accuracy throughout the fulfillment process, enabling warehouse staff to verify that correct items and quantities are being shipped while providing customers with a clear record of what they should receive. They differ from invoices by focusing solely on physical shipment contents rather than pricing information.

For example, when a customer orders three different products, the packing slip ensures the picker selects the right items, the packer verifies completeness, and the customer can confirm receipt of their full order. Modern WMS platforms often integrate packing slip generation with barcode scanning and automated sorting systems to minimize errors and streamline operations.

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