Import Documents Checklist for US Shippers

Every US import needs a core set of documents: a commercial invoice, a packing list, a transport document (an ocean bill of lading or an air waybill), and, for ocean freight, an Importer Security Filing (ISF, or 10+2). Add a certificate of origin when you are claiming a trade-agreement duty rate, and partner government agency paperwork when the goods are regulated by the FDA or USDA. Your customs broker assembles these into the entry that US Customs and Border Protection (CBP) uses to clear the shipment and assess duties. Missing or inaccurate import documents are one of the most common reasons freight sits at the port racking up storage charges.

Key takeaways

• The non-negotiable trio for almost any shipment is the commercial invoice, the packing list, and the bill of lading or air waybill.
• The ISF (10+2) is ocean-only and must be filed at least 24 hours before the cargo is loaded at the foreign port.
• The seller usually prepares the invoice and packing list; the carrier issues the transport document and the arrival notice; your broker files the CBP entry.
• A certificate of origin is only needed to claim preferential duty rates or when a product rule requires it, not on every load.
• FDA- and USDA-regulated goods need extra filings on top of the standard set, and missing them holds the shipment.

What import documents does a US importer need?

Most shipments clear on a standard set of five to seven documents, and the exact list depends on how the goods move and what they are. The commercial invoice, packing list, and transport document travel with nearly every shipment. Ocean freight adds the ISF. Regulated goods and preferential duty claims add their own paperwork on top.

Think of it in three groups: commercial documents that describe the sale and the goods, transport documents that prove the carrier is moving them, and regulatory filings that satisfy CBP and any partner agency. Getting a clean set to your broker before arrival is the difference between a same-day release and a hold. The documents your customs broker needs guide covers the same set from the broker's side.

What is a commercial invoice and who prepares it?

A commercial invoice is the seller's bill of sale for the shipment, and it is the single most important import document because CBP calculates duties and checks admissibility from it. The seller or exporter prepares it, since they know the true transaction value, the terms of sale (the Incoterms), and the precise product description.

A usable invoice states the buyer and seller, a clear description of each item, the quantity, the unit and total value, the currency, the country of origin, and the Incoterms. Vague descriptions such as "parts" or "gifts," or a value that does not match the real transaction, are classic triggers for a customs review. As the importer of record you are legally responsible for that accuracy even though you did not type the document. For a field-by-field breakdown, see what a commercial invoice is.

What goes on the packing list?

A packing list itemizes exactly how the shipment is packed: how many cartons or pallets, what is inside each, and the weights and dimensions. It lets the carrier, the broker, and CBP reconcile what was shipped against what arrives, and it is what a customs officer checks against during a physical exam.

The seller prepares it, and it should mirror the commercial invoice line for line. Where the invoice carries values, the packing list carries piece counts, net and gross weights, and carton or pallet measurements. Those dimensions also feed your freight and landed cost math, so it is worth confirming they are accurate rather than copied from a previous order.

Bill of lading vs air waybill: what is the difference?

A bill of lading is the transport document for ocean freight, and an air waybill is its equivalent for air. Both are issued by the carrier or forwarder and prove the shipment was received for carriage, but the bill of lading can also be a document of title, meaning whoever holds an original negotiable bill can claim the goods. An air waybill is not a document of title.

Feature	Bill of lading (ocean)	Air waybill (air)
Mode	Ocean and inland waterway	Air
Issued by	Ocean carrier or NVOCC/forwarder	Airline or air forwarder
Document of title	Yes, if negotiable	No
Release of goods	Often requires surrender of an original	Against consignee identity and charges

The practical point for a shipper: on ocean freight, confirm early whether you have an original (negotiable) bill or a telex/express release, because a missing original can strand your container at the port.

What is the ISF (10+2) and when is it due?

The Importer Security Filing, commonly called ISF or 10+2, is an advance data filing CBP requires for ocean cargo, and it must reach CBP at least 24 hours before the goods are loaded onto the vessel at the foreign port. It carries ten data elements from the importer plus two from the carrier, which is where the "10+2" name comes from. It does not apply to air, truck, or rail.

Because the deadline is tied to vessel loading overseas, the ISF is almost always filed by your broker or forwarder using data from the commercial invoice and booking. Late, incomplete, or inaccurate filings can draw liquidated-damages claims from CBP, so treat the ISF as an early-warning checklist item, not a formality. CBP publishes the current requirements at CBP.gov.

What is an arrival notice, and when does a certificate of origin apply?

An arrival notice is the message the carrier or forwarder sends when your shipment reaches, or is about to reach, the destination port. It lists the shipment particulars, the charges due, and the pickup location, and it is your cue to have the broker file the entry and arrange delivery before free time runs out and demurrage or storage charges begin.

A certificate of origin, by contrast, is a document certifying where the goods were produced. You need it when you are claiming a preferential duty rate under a trade agreement such as USMCA, or when a product or destination rule specifically calls for one. For many ordinary shipments the origin stated on the commercial invoice is sufficient. Claiming a lower duty rate without valid origin support is a common reason an entry gets flagged, so match the certificate to the claim you are actually making.

What PGA documents do FDA or USDA imports need?

Goods regulated by a partner government agency (PGA) need extra filings on top of the standard set, submitted electronically alongside the CBP entry. Food, beverages, drugs, cosmetics, and medical devices fall under the FDA; plants, animal products, and many agricultural goods fall under the USDA. Missing the PGA data does not just slow the entry, it holds the shipment until the filing is complete.

Common examples include FDA prior notice for food shipments and facility registration for the foreign supplier, and USDA permits or phytosanitary certificates for plants and certain animal products. Which apply depends entirely on the commodity and its Harmonized Tariff Schedule classification, so confirm the requirements with your broker before shipping, not after arrival. The FDA outlines its import program under the Food Safety Modernization Act, and CBP coordinates PGA data through its entry systems.

Import documents checklist: what each is for and who prepares it

Use this as a pre-shipment checklist. Confirm every applicable row is complete and consistent before the documents reach your broker.

Document	What it is for	Who prepares it
Commercial invoice	Value, description, and terms; basis for duties	Seller / exporter
Packing list	Piece counts, weights, dimensions for reconciliation	Seller / exporter
Bill of lading / air waybill	Proof of carriage; ocean BOL can be title	Carrier or forwarder
ISF (10+2)	Advance security data for ocean cargo	Importer, filed by broker/forwarder
Arrival notice	Signals arrival; triggers clearance and pickup	Carrier or forwarder
Certificate of origin	Supports preferential duty claims	Exporter / chamber of commerce
FDA / USDA (PGA) filings	Regulatory clearance for controlled goods	Importer, filed by broker

Worked example: you import 12 pallets of packaged dry snacks from Mexico by ocean. Your seller issues the commercial invoice and packing list, your forwarder files the ISF at least 24 hours before the vessel loads in Manzanillo, and because the goods are food you also need FDA prior notice. You claim the USMCA duty rate, so you keep a USMCA certification of origin on file. When the arrival notice lands, your broker files the CBP entry against all of it and the container is released. Skip the prior notice and the same shipment sits until you supply it.

How do you avoid document-related delays?

The reliable pattern is to get a complete, internally consistent document set to your broker before the goods arrive, not while they sit at the terminal. Confirm the invoice value and description match the packing list, that the ISF is filed on time for ocean freight, and that any PGA filing is identified before departure.

If you are still choosing who files your entries, a good customs broker will tell you exactly which documents your specific commodity needs and flag PGA requirements up front. Compare customs brokerage providers in the directory, read up on how customs clearance works end to end, and if you ship low-value parcels, check how the Section 321 de minimis changes affect what you need to file.