A shipment is not held at a port because of the product. It is held because a document was wrong, missing or inconsistent with another document. Understanding the document set in advance is the cheapest risk reduction available to an importer.
This page explains the documents that typically accompany an international shipment of pet food or pet supplements, who issues each one, and which questions to settle with your freight forwarder and customs broker before the first order — rather than while a container is sitting in a terminal.
These four documents describe the transaction itself and are produced for every shipment.
The commercial invoice states what was sold, to whom, for how much. It is the document customs values the shipment against, which is why consistency with the purchase order and the payment record matters more than any particular format. The packing list describes how the goods are physically arranged — cartons, weights, dimensions, marks and numbers — and it is the document a warehouse or terminal works from.
The transport document — a bill of lading for sea freight, an air waybill for air freight — is issued by the carrier or forwarder. It is both the receipt for the goods and, in many trade finance arrangements, the instrument that releases them. Errors here cause more port delays than any other category, which is why it is worth reviewing the draft before it is issued rather than after.
The certificate of origin identifies where the goods were produced. Beyond customs purposes, it matters where a trade agreement between the exporting and importing country allows a preferential duty rate, because that claim generally depends on it.
These are the documents that vary most between destinations, and they are where assumptions cause the most expensive mistakes.
| Document | Typically issued by | Why it is requested |
|---|---|---|
| Health or veterinary certificate | An authorised authority in the exporting country, on the basis of inspection or of the manufacturer's documentation | Some destinations require an official attestation about the product and the facility before they will release it |
| Free sale certificate | Usually an authority in the country of manufacture | Evidence that the product is lawfully sold in its home market |
| Certificate of analysis | The manufacturer's laboratory, or a third-party laboratory | Batch-level composition, for buyer specification and sometimes for the importing authority |
| Manufacturer declaration or statement | The manufacturer | Confirms composition, absence of specified materials, or compliance with a stated standard |
| Labelling artwork and translations | The brand, often with regulatory review | Labels are frequently checked against the declared product at the border |
Because these requirements are set by the destination market and change over time, the operational rule is straightforward: ask which documents your destination requires before the order is placed, and confirm the answer with your customs broker or a regulatory adviser in that market rather than relying on precedent from another country or a previous shipment.
A cargo insurance certificate or policy may be required by the buyer's bank, by the trade term agreed, or simply by prudent risk management — sea freight is exposed to handling, condensation and delay damage that no packaging fully removes. On the payment side, depending on how the transaction is structured, a letter of credit will specify its own document list, and that list frequently includes documents not required by customs at all. It is worth reading the credit's requirements before production, because a discrepancy at presentation is where payment gets delayed.
The single most useful principle in export documentation is that authorities cross-check documents against each other. Product descriptions, quantities, weights, marks and dates should tell the same story on the invoice, the packing list, the transport document and any certificate. A shipment can be perfectly compliant in substance and still stopped by a mismatch between two pieces of paper.
Practically, this argues for one person in the brand's team reviewing the complete document set together before dispatch, rather than each document being checked by whoever produced it.
That depends on the destination and on the trade term agreed. The commercial set is standard; the veterinary, free-sale and declaration documents depend on what the destination requires, and it is worth confirming that list before ordering.
Official certificates are typically issued by an authority in the exporting country, sometimes on the basis of the manufacturer's documentation. Manufacturer declarations are issued by the manufacturer.
The destination's document requirements, who issues each item and how long each takes, the trade term and who clears what, and the document list in any letter of credit.
Planning a first export shipment? Shandong Guihe Pet Food Co., Ltd. manufactures pet supplements and pet food in Yishui County, Linyi, Shandong, with a 12,000 m² plant and 30,000 tons of annual capacity. See our OEM & ODM services, read about trade terms explained, or see what testing documents cover.