Documentation
How Independent Inspection Works in Commodity Trading
An independent inspector gives buyer and seller a neutral measure of how much cargo moved and to what quality. It underpins payment and trust in a deal; see our inspection service.
How does independent inspection work in commodity trading?
Independent inspection is the appointment of a neutral surveyor to measure the quantity and sample the quality of a cargo at loading and again at discharge. The inspector gauges tanks, draws representative samples, witnesses the transfer and issues certificates of quantity and quality that both buyer and seller rely on. Because the inspector is independent of both parties, these certificates are accepted as objective evidence for payment and for resolving disputes.
What the inspector does
- Quantity: measures volumes by shore-tank gauging, vessel ullage or metering, with temperature and density corrections.
- Quality: draws representative samples and tests key properties such as API gravity, sulphur and water content.
- Witnessing: observes the loading or discharge operation and records the sequence of events.
- Documentation: issues certificates of quantity and quality and a report of findings.
At load and at discharge
Inspection usually happens twice: at the load port to establish what left, and at the discharge port to establish what arrived. Comparing the two helps identify transit losses and settles any question about whether the delivered cargo met the contract.
Why independence matters
Because the surveyor is engaged to act impartially rather than for one side, the figures carry weight with both parties and with banks. The quantity and quality certificates typically form part of the documents presented for payment; see transaction documents and letters of credit.
In practice
Major international inspection companies operate at the main loading and discharge ports. 3FB Energy & Trade coordinates independent inspection as part of cargo operations so that quantity and quality are documented by a neutral third party.
Frequently asked questions
Who appoints the independent inspector?
The parties agree an inspector in the contract. The point is that the surveyor acts impartially, so the certificates are accepted by both buyer and seller.
What does the inspector measure?
Both the quantity of cargo, by gauging or metering with temperature corrections, and its quality, by sampling and laboratory testing of key properties.
Why inspect at both load and discharge?
To establish what was loaded and what was delivered, which helps quantify transit losses and confirm the cargo met the contract.
