Packing List (PL)

Your container arrives at the port. Customs wants to verify the contents. The commercial invoice says “5,000 units of kitchen accessories,” but that doesn’t tell anyone which boxes contain the garlic presses and which contain the silicone spatulas, how many cartons are in the shipment, or what each carton weighs. The packing list fills that gap. It’s the document that maps exactly what’s inside a shipment at the carton level.

What a Packing List Contains

A proper packing list breaks the shipment down into granular detail:

• Carton numbers: Sequential numbering (carton 1 of 200 through 200 of 200) so every box is individually identifiable
• Contents per carton: What product is in each carton, listed by SKU, model number, or description
• Quantity per carton: How many units are in each box
• Gross weight per carton: The weight including packaging, usually in kilograms
• Net weight per carton: The weight of the products only, excluding packaging
• Carton dimensions: Length, width, and height, usually in centimeters
• Total shipment summary: Total number of cartons, total gross weight, total net weight, total volume (CBM)

Some packing lists also include marks and numbers (the shipping marks printed on the outside of each carton), the material composition of the products, and country of origin markings. The more detail your supplier includes, the smoother every downstream process becomes.

Packing List vs. Commercial Invoice

These two documents cover different ground. The commercial invoice is a financial document: it records the transaction value, payment terms, buyer and seller information, and the declared value for customs purposes. The packing list is a physical document: it describes what’s physically in the shipment, how it’s packed, and how much it weighs. Both are required for customs clearance. Both travel with the shipment. But they serve different functions.

A common mistake is having discrepancies between the two. If your commercial invoice says 5,000 units and your packing list adds up to 4,800 units, customs will flag it. If the total weight on the packing list doesn’t match the weight declared on the bill of lading, your freight forwarder will have questions. Inconsistencies between these documents are one of the top reasons shipments get held for examination at the port, adding days of delay and hundreds of dollars in storage fees.

Why Accuracy Matters for FBA Sellers

For ecommerce sellers shipping inventory to a prep center or directly to an Amazon fulfillment center, the packing list serves as the receiving blueprint. When a 3PL receives your container, they check the actual carton count, weight, and contents against the packing list. If carton 47 is supposed to contain 24 units of SKU A but actually contains 18 units of SKU A and 6 units of SKU B, that’s caught at receiving rather than showing up as an inventory discrepancy later at Amazon.

Amazon’s own inbound receiving process depends on accurate carton-level information. When you create an FBA shipping plan and provide box content information (the “tell Amazon what’s in each box” step), that data should match what’s physically in the boxes. Mismatches cause receiving delays and sometimes inventory placed under the wrong FNSKU, which leads to customer complaints, returns, and potential listing suspensions.

Getting a Good Packing List From Your Supplier

Most overseas suppliers will provide a packing list, but the quality varies enormously. Some factories send a single-line packing list that says “200 cartons, 5,000 units, 2,400 kg” and nothing else. That’s technically a packing list, but it’s useless for customs clearance and warehouse receiving. You need carton-level detail.

Specify your packing list requirements in your purchase order. Request carton-by-carton breakdowns with weights and dimensions. Ask for the document in both PDF and Excel format so your customs broker and 3PL can work with the data without manual re-entry. If your supplier pushes back, that’s a red flag about their quality control processes in general.

When your shipment goes to a 3PL for prep and forwarding to Amazon, the packing list becomes the reference document for the entire inbound workflow. The prep team uses it to verify receiving, plan labor allocation (knowing exactly how many units of each SKU to expect), and create accurate FBA shipping plans with correct box content information. Errors on the packing list cascade through every step that follows, so getting it right at the source saves time, money, and a lot of back-and-forth emails with your supplier after the container has already shipped.