How a cargo is paid for: the trade finance instrument spine

A documentary letter of credit is an undertaking by a bank, given at the request of a buyer, to pay a seller against presentation of specified documents — typically a bill of lading, a commercial invoice, a packing list, an inspection certificate and a certificate of origin. The general mechanics of the instrument, including its independence from the underlying contract, are set out at the LC-backed facility and at letter of credit; this page is concerned with what the instrument does specifically to a cargo transaction.

The bank pays against paper, not against the cargo. It has no obligation and, in the ordinary course, no practical means to inspect the goods themselves. Its undertaking is satisfied — or not — entirely by whether the presented documents comply on their face with the credit's terms. This is a feature, not an oversight: it is what lets a bank in one jurisdiction commit to a cargo it will never see, moving on a vessel it does not track, on the strength of a documentary standard rather than a physical one. It is also the instrument's central limitation, and everything about inspection and quality determination downstream in this page exists because of it.

Three variants recur in cargo trade, distinguished by when payment is released.

A sight credit pays on presentation of compliant documents, without further delay. It is the closest cargo finance comes to cash, and it is priced and structured accordingly.

A deferred-payment credit obliges the bank to pay a stated number of days after a compliant presentation — commonly tied to the bill of lading date — rather than immediately. This gives the buyer a financing window between taking title to the documents and having to pay for them, and it is negotiated as a term of trade rather than treated as a concession.

A confirmed credit adds a second bank's independent undertaking to the issuing bank's. Where a seller does not know the issuing bank, will not accept its country risk, or wants a second address for payment, confirmation substitutes a bank it does know for one it does not. Confirmation is a distinct commercial decision with its own cost and its own availability question, not a formality that attaches automatically to every credit.

What all three share is the discipline that makes the instrument work: the documents have to be prepared to match the credit's terms exactly, because a bank that pays against a non-compliant presentation has stepped outside its mandate, and a bank asked to pay against one is entitled to refuse.

Not every cargo moves under a letter of credit, and the alternative mechanisms allocate risk very differently.

Prepayment — the buyer pays before the seller ships — puts the buyer entirely at the seller's mercy for performance. It is used where the seller is the stronger party commercially, where the material is scarce enough that sellers can dictate terms, or where the buyer has no other way to secure supply. What secures a prepayment, when anything does, is rarely the payment instrument itself: it is typically a repayment or performance guarantee from the seller's bank, sized to the prepaid amount and callable if shipment does not occur, or an advance-payment bond structured on the same logic as a standby credit. Absent one of those, a prepayment is an unsecured credit exposure to the seller dressed as a commercial term.

Advance-payment structures sit between prepayment and a documentary credit — a portion of the price is paid on order or on defined progress milestones, with the balance released against shipping documents. This is the standard shape for cargoes that require lead time to produce, source or assemble, and it mirrors the staged-payment logic used on long-lead equipment. What secures the advance portion is the same question as with prepayment: a guarantee, a bond, or nothing.

Open account — the seller ships and invoices, and the buyer pays on agreed terms after the fact, with no bank undertaking standing between them — is the least protected mechanism for the seller and the least costly for the buyer. It is appropriate where the relationship has enough history that the credit risk is genuinely known, where the buyer's credit standing is strong and independently verifiable, where the jurisdictions and enforcement environment are ones the seller is comfortable relying on directly, or between related entities where the credit question is internal rather than commercial. Used outside those conditions, open account simply relocates non-payment risk onto the seller without pricing it.

The choice among these mechanisms is a negotiation about whose balance sheet carries the exposure between shipment and payment, and it is settled well before any cargo moves — retrofitting a payment mechanism after a shipment is underway is not something any of these instruments are built to do.

Payment, title and risk are three separate events, and a common error is assuming they move together. They do not, and the gaps between them are where disputes live.

Risk — who bears loss if the cargo is damaged or lost in transit — passes at a point fixed by the sale contract's delivery term, typically one of the standard trade terms that fix the moment the seller's responsibility ends and the buyer's begins, most often at the point the cargo is loaded aboard the vessel or handed to the first carrier. Title — legal ownership of the goods — passes at whatever point the sale contract or the applicable law fixes, which is frequently, but not necessarily, tied to the transfer of the shipping documents rather than to the physical movement of the cargo. Payment happens on whatever schedule the instrument in the previous section establishes. None of the three is required to coincide with either of the others, and in an ordinary letter-of-credit transaction they typically do not: risk passes at loading, documents and the title they carry pass when the credit is drawn, and the buyer may not physically receive the cargo until well after both.

The bill of lading is what makes this workable, because it is the pivot the whole arrangement turns on. It is simultaneously a receipt for the goods, evidence of the contract of carriage, and — in its negotiable form — a document of title: whoever holds a properly endorsed original controls the right to take delivery of the cargo from the carrier. This is why it is the document a documentary credit is built around. The bank is not really examining a shipping receipt; it is confirming that the instrument conferring control over the cargo has been transferred through the documentary chain in the sequence the credit specifies. A seller that has been paid but never surrenders a valid bill of lading has not actually given up the cargo. A buyer that holds a valid bill of lading can take delivery whether or not the underlying payment dispute between the parties has been resolved.

The practical consequence is that the bill of lading, not the invoice and not the payment instrument, is the document whose custody chain has to be controlled with the most care. A bill issued in multiple originals, released against an indemnity before all originals are surrendered, or endorsed to the wrong party, breaks the link between paying for a cargo and controlling it — and no letter of credit corrects that once it has happened.

A documentary credit tells the bank the paperwork is in order. It says nothing about whether the cargo actually loaded matches what the paperwork describes, which is exactly the gap independent inspection exists to close.

Inspection happens at two points, and they answer different questions.

At load, an independent surveyor draws samples, verifies quantity by draft survey or by weighing, and issues a certificate that typically becomes one of the documents presented under the credit. This certificate establishes the position at the moment the seller's responsibility ends — it is the evidentiary basis for the claim that the cargo conformed to specification and to quantity when it left the seller's control.

At discharge, an independent surveyor at the receiving port repeats the exercise. Where the two certificates agree, the transaction closes cleanly. Where they diverge — a lower quantity, an off-specification result, visible contamination or damage — the dispute is precisely about which reading governs and why the two differ: cargo can genuinely degrade, be contaminated, or lose or gain weight in transit for reasons unrelated to what was loaded, and a discharge certificate that shows a problem does not, by itself, establish when the problem arose. On an unpackaged bulk commodity the stakes are higher still, because a cargo cannot be segregated by origin once loaded and a quality dispute is an argument about the whole shipload rather than an identifiable defective unit — the worked version of that problem is set out at financing a sulfur cargo.

What resolves that dispute is rarely the payment instrument — the credit has typically already paid against a compliant load certificate by the time a discharge dispute arises, which is exactly why the certificate's rigor at load matters so much more than it appears to at the time. What resolves it is the sale contract's own allocation of responsibility: which surveyor's finding is contractually final, whether an umpire or referee inspector is named for disagreements, what tolerance is allowed before a discrepancy is even actionable, and who pays for the inspection itself. A contract silent on all of that has not avoided the question; it has deferred it to whichever party is willing to litigate longest.

How cargo payment arrangements actually go wrong, in rough order of frequency:

• Demurrage was treated as a shipping-desk line item rather than a credit exposure. Laytime is the period a vessel is allowed for loading or discharge under the charter or bill of lading terms; demurrage is the liquidated sum owed for every day the vessel is held beyond it, and it accrues without a contractual cap in most standard forms. A cargo held up by a documentary dispute, a financing delay, a late-arriving inspection or a port congestion problem generates demurrage the whole time it sits — and because the obligation to pay it typically runs to the charterer regardless of why the delay occurred, it is a real, uncapped, day-counting exposure that sits entirely outside the payment instrument financing the cargo itself. Treating it as an operational afterthought rather than underwriting it as a contingent liability is the most common and most expensive failure on this page.
• A discrepant presentation was discovered after the goods had sailed. Documents that do not comply with the credit's exact terms entitle the bank to refuse payment, and refusal after shipment leaves the seller with a cargo in transit and no paid undertaking behind it. The discipline is to reconcile the presentation against the credit before the vessel loads, not after.
• The bill of lading's custody chain broke. Multiple originals in circulation, a release against a letter of indemnity before all originals were surrendered, or an endorsement to the wrong party. Once that happens, paying for the cargo and controlling the cargo are no longer the same fact, and no amount of after-the-fact reconciliation restores it cleanly.
• Load and discharge certificates diverged, and the contract did not say what happens next. No named umpire inspector, no defined tolerance, no allocation of the inspection cost. The dispute defaults to whichever party has more patience.
• Open account was extended past the relationship that justified it. Terms granted on the strength of a buyer's early payment history, continued unexamined as volumes grew, until a single late cycle exposed an unsecured position sized well beyond what the original credit judgment supported.
• A prepayment or advance was made against a guarantee that was never actually confirmed as valid, current and callable. A document labelled as a guarantee is not the same thing as an enforceable, in-date instrument issued by a bank the buyer would actually be willing to pursue.
• Title and payment were assumed to be the same event. A buyer that has paid assumes it owns the cargo; a seller that has released the bill of lading assumes it has been paid. Both assumptions can be wrong at once, because nothing in the transaction actually links them except the specific documentary sequence the credit or the contract specifies.

Continuum structures and arranges financing around cargo transactions and coordinates the parties to them. It does not take title to goods, does not trade, does not source or broker cargoes, and does not hold client funds; it is not a bank, a broker-dealer or a direct lender. Nothing on this page is legal, documentary-compliance or shipping advice — the drafting of a specific credit, charter or sale contract is a matter for counsel and for the parties' own documentary specialists.