Letter of Credit vs Telegraphic Transfer: What Changes

A shipment's payment method is not just a finance decision — it decides which documents actually matter, who is allowed to claim the cargo at destination, and when the exporter actually gets paid relative to when the goods leave. A Thai importer or exporter choosing between telegraphic transfer (TT) and a letter of credit (LC) is really choosing between two different systems for controlling risk, and each system pulls specific shipping documents into a different role. This matters to a freight forwarder as much as it matters to a bank, because the payment method decides whether a Bill of Lading needs to travel as an original, whether a telex release is even possible, and whether the sailing date and routing negotiated with the carrier will actually fit inside the terms already agreed with the bank.

This article sets out how TT and LC actually work, why the LC turns the Bill of Lading into a financial instrument rather than just a transport receipt, where LC document sets most often fail in practice, and the freight consequences that exporters tend to underestimate until they run into them. It also covers the middle ground — documents against payment and documents against acceptance — and a practical way to decide which instrument fits a given deal.

How TT actually works

A telegraphic transfer is, mechanically, nothing more than a bank wire: the buyer instructs its bank to move funds to the exporter's bank account, the message travels through the banking network, and the exporter's bank credits the account once it arrives. The bank moving the money does not examine shipping documents, does not verify that goods were actually shipped, and takes on no obligation of its own to see the deal through — it is simply executing a payment instruction from its customer.

That simplicity is exactly why TT is fast and cheap to settle relative to a documentary instrument. There is no document set to check against a set of conditions, no compliance review, and no waiting on a bank's own decision about whether to honour a presentation. Once the wire is sent and received, the transfer of funds is complete.

In practice, TT is used in a few structural patterns. Payment in advance, before production or shipment, puts the exporter in the strongest position and the buyer in the most exposed one — the buyer is trusting the exporter to actually ship after being paid in full. Payment on arrival, after the buyer has received the goods or the shipping documents, reverses that entirely: the exporter has already shipped, and is trusting the buyer to actually pay once it holds the goods. Between these sits the common split arrangement — a portion paid in advance to commit both sides to the deal, with the balance paid against shipment or against a set of shipping documents the exporter sends once the goods are on board. Splitting the payment doesn't eliminate the timing risk; it simply divides it, with each side still exposed on its own portion until the other side performs.

What TT never does is transfer any of that risk onto a bank. Whatever exposure exists in the arrangement stays exactly where the timing places it — on the buyer if it pays first, on the exporter if it ships first.

How an LC actually works, and the principle that governs it

An LC is a fundamentally different kind of instrument. Rather than a payment instruction, it is the issuing bank's own conditional undertaking — a promise made by the bank itself, independent of the underlying sale contract, to pay a stated sum once a specific set of documents is presented in compliance with the LC's terms. That independence is the point: the bank's obligation runs on the documents in front of it, not on whether the buyer is satisfied with the goods those documents describe.

Four parties typically sit around an LC. The applicant is the buyer, who instructs its bank to open the credit. The beneficiary is the exporter, who is entitled to draw on it once compliant documents are presented. The issuing bank is the applicant's bank, which makes the actual undertaking to pay. The advising bank, usually located in the exporter's country, authenticates and forwards the LC to the beneficiary; where the exporter wants an additional layer of assurance, that bank (or another bank) can also add its confirmation, becoming a confirming bank with its own separate undertaking alongside the issuing bank's.

An LC can be structured as a sight credit, where payment is made as soon as compliant documents are presented and examined, or a usance credit, where presentation of compliant documents creates a deferred payment obligation that matures after a stated tenor rather than paying immediately. Either way, the underlying mechanic doesn't change.

The principle that governs everything about how an LC is examined and paid is simple to state and easy to underestimate in practice: banks deal in documents, not goods. The bank examining a presentation never inspects the cargo, never verifies that what's inside the container matches the paperwork, and has no way to do either from a desk in a documentary examination department. It reads the documents against the LC's own wording and decides, on paper alone, whether they comply. That means a shipment that went out perfectly, on time, in full, with the right goods correctly packed, still does not get paid on time if its document set doesn't match the LC precisely. Conversely, a document set that complies exactly gets paid even if the buyer, once the goods arrive, is unhappy with them for reasons that have nothing to do with the documents themselves.

Why the LC turns the Bill of Lading into a financial instrument

The reliance on documents, rather than goods, is exactly why an LC changes what the Bill of Lading is for. Under a straightforward TT arrangement, a B/L is primarily a transport document — evidence of what was shipped and a receipt for the cargo. Under an LC, it becomes something more: a document of title, meaning whoever holds an original of it has the ability to claim the cargo at destination.

Two features of the B/L determine exactly who that is. The consignee field states who the carrier will release the goods to, or, if the B/L is made out "to order," it states whose endorsement is required before anyone can claim the cargo. An LC typically calls for the B/L to be made out to order and endorsed in a way that keeps control with the bank — commonly to the order of the issuing bank, or endorsed by the shipper in blank once it's in the bank's possession — so that the bank physically holds the one document that lets someone walk into the destination port and take the cargo.

That control is what secures the whole transaction from the bank's perspective. The issuing bank releases the original B/L to the applicant only once the applicant has paid (under a sight LC) or accepted a deferred payment obligation (under a usance LC). Until that happens, the applicant has no way to claim the cargo even if it has arrived and is sitting at the port, because it doesn't hold the document that entitles it to do so.

This is exactly why LC shipments are usually incompatible with a telex release or a surrendered B/L. Telex release and surrender both work by giving up the physical original entirely — the carrier is instructed to release cargo to the named consignee without anyone presenting an original document at all. That's a convenience that makes sense when the parties trust each other and the payment method doesn't rely on controlling the paper. Under an LC, it defeats the entire mechanism the bank is relying on: if the goods can be claimed without an original B/L, the bank's custody of that original stops meaning anything, and its whole security disappears. An exporter under LC terms who arranges a telex release, whether by habit or misunderstanding, can end up having handed over the cargo for free while the LC's documentary trail is still sitting unpresented at the bank.

Where LC document sets fail in practice

The strict, document-only examination that gives an LC its security is exactly why discrepancies are common, and it's worth being honest about the categories they usually fall into, because most of them are entirely avoidable with the right checks before presentation.

Late presentation happens when documents reach the bank after the LC's stated presentation period has closed — a window that starts running from the shipment date, not from whenever the exporter gets around to assembling the paperwork. Shipment after the latest shipping date is its own separate failure: the B/L's on-board date has to fall on or before the date the LC allows, and a carrier's actual sailing schedule doesn't always cooperate with a date set weeks earlier. A description mismatch occurs when the goods description on the invoice doesn't read the same as the wording specified in the LC — banks read this literally, and a paraphrase or an abbreviation can be enough to trigger it. Wrong or missing endorsement covers a B/L that isn't endorsed the way the LC's consignee and "to order" instructions actually require. Insurance cover not matching the LC happens when the type or extent of cover on the insurance certificate falls short of what the LC specifies, which is a document risk as much as an insurance one. Inconsistent weights or quantities across the invoice, packing list, and B/L is one of the most common and most preventable categories, since it usually traces back to a late change on one document that didn't get carried through to the others. And transhipment or partial shipment prohibited by the LC becomes a discrepancy whenever the actual routing or shipment pattern doesn't match what the LC's wording allows, regardless of whether the goods arrived safely.

Banks are strict about all of this not out of rigidity for its own sake, but because strict, mechanical compliance is the only thing a documentary examination can actually verify. The bank has no independent way to know the goods are fine; the documents are the only evidence in front of it, so it holds them to the letter of what the LC asked for.

What a discrepancy actually does to the payment decision

A document discrepancy is not automatically the end of the transaction, and it's worth being precise about what actually happens next, because the outcome is less certain — and less exporter-friendly — than either "payment fails" or "payment proceeds as normal."

When the bank examining a presentation finds a discrepancy, it has to notify the beneficiary that the documents don't comply. From there, a few paths are possible. The beneficiary might be able to correct and re-present the documents if there's still time left in the presentation period. If not, discrepant documents can still be sent forward for the applicant's own review — effectively asking the buyer whether it's willing to accept them despite the mismatch. The issuing bank can also approach the applicant directly to ask for a waiver of the discrepancy before deciding whether to honour the presentation.

The practical effect of all these paths is the same: a discrepancy shifts the decision about whether payment happens away from the bank's own independent undertaking and puts it, in substance, in the buyer's hands. That's precisely the opposite of what an LC is supposed to achieve for the exporter. The entire reason to use an LC instead of TT is to remove reliance on the buyer's willingness to pay; a discrepancy reintroduces exactly that reliance, at the worst possible moment — after the goods have already shipped, when the exporter's negotiating position is far weaker than it was before the cargo left.

This is why the practical goal for an exporter isn't to understand what happens after a discrepancy is found — it's to avoid needing that knowledge in the first place, by building document preparation and cross-checking into the shipment process early enough that a mismatch is caught before presentation rather than after.

The freight consequences of LC terms that exporters underestimate

Because an LC is negotiated and opened before the goods move, several of its terms are effectively freight commitments made in advance — and they're the ones exporters most often discover are unworkable only after the LC has already been accepted.

The latest shipping date is set when the LC is opened, often weeks before the actual booking is made, and it doesn't automatically account for a carrier's real sailing frequency on the relevant route or the space actually available around that time. An exporter who accepts a latest shipping date without checking it against the carrier's schedule and current booking situation can find, close to the deadline, that the only available sailing falls after the date the LC allows — a problem that has nothing to do with production readiness and everything to do with a date that was never realistic for the trade lane in the first place.

An LC that prohibits transhipment creates a similar trap on a routing that has no direct service to the discharge port. Many destinations are only reachable via a transhipment hub, and an exporter (or its forwarder) needs to confirm the actual routing before accepting a no-transhipment clause, not after booking space and finding out the only service available runs through a hub.

Insurance requirements built into the LC — a specified type or level of cover — have to be arranged before shipment if the LC (and the underlying Incoterm) puts that responsibility on the exporter, since the insurance certificate is one of the documents that has to be presented alongside the others. Leaving this until after the goods are already moving risks either missing the requirement entirely or arranging cover that doesn't match what the LC specifies.

Finally, the presentation period itself needs to be realistic against how long it actually takes to assemble the full document set at origin — certificates of origin, inspection certificates, and any other paperwork the LC calls for. A presentation period that looked comfortable when the LC was opened can turn out to be too short once the actual shipment date lands later than planned, squeezing the time available to gather everything and get it to the bank.

All four of these belong in the negotiation before the LC is accepted, when there's still room to request a workable term. None of them are things an exporter wants to discover for the first time at the bank counter.

Cost and effort: what changes structurally, not by how much

Comparing the cost and effort of TT and LC is easiest to describe structurally, without attaching a figure to it, because the actual amounts vary by bank, by country, and by the specific terms of each credit.

An LC brings bank charges into the transaction at multiple points — the issuing bank charges the applicant for opening the credit, the advising bank charges for authenticating and forwarding it, a confirming bank (if used) charges separately for adding its own undertaking, and further charges typically apply for examining documents, for handling any amendment, and for a usance credit's deferred-payment mechanics. Those charges sit on top of the underlying cost of the goods and are a real, structural cost of using the instrument, distinct from anything the exporter or importer would pay for the shipment itself.

Alongside the direct charges, an LC creates real workload on both sides. The exporter (or its own bank, if using a negotiating bank's services) has to assemble a document set and check it line by line against the LC's wording before presentation, since the margin for error is effectively zero once a discrepancy is on the table. The importer's side has equivalent work up front, drafting LC terms that are workable and then reviewing whatever documents come in against them. None of this is present in a TT arrangement, which is, structurally, just a payment instruction with essentially no document review built in.

That's the real trade-off: an LC exchanges TT's speed and low cost for a documentary security mechanism that has its own cost and its own administrative burden, on both sides of the deal. Neither instrument is inherently the right or wrong choice — the trade-off is between paying for security and paying for simplicity, and which one makes sense depends on the underlying relationship and risk, not on the instrument itself.

The middle ground: documents against payment and documents against acceptance

Between TT's reliance on trust and an LC's full documentary security sit two collection methods that route documents through the banking system without either bank taking on its own undertaking to pay: documents against payment (D/P) and documents against acceptance (D/A).

Under D/P, the exporter's bank sends the shipping documents through banking channels to a bank in the buyer's country, with instructions to release them to the buyer only once the buyer pays. The buyer cannot get hold of the documents — and therefore cannot claim the cargo, if the B/L is structured accordingly — without paying first. This gives the exporter document control similar in spirit to an LC's, but without a bank's own promise behind it; if the buyer simply refuses to pay, the exporter is left holding documents (and potentially cargo) at a bank overseas, without the bank being on the hook for anything.

Under D/A, the documents are instead released against the buyer's acceptance of a bill of exchange — a signed promise to pay at a stated future date, rather than immediate payment. This gives the buyer the documents, and with them the ability to claim the goods, before actually paying anything. That's a meaningful extension of credit from the exporter to the buyer, and it carries the corresponding risk: once the buyer has the documents and the goods, its incentive to honour the bill of exchange when it eventually falls due is entirely a matter of its own creditworthiness and willingness to pay, with no bank commitment standing behind that promise.

What both instruments actually secure is the routing of documents through a banking channel rather than direct exporter-to-buyer transmission, which at minimum prevents a buyer from getting the documents without going through the agreed process. What neither of them secures is the buyer's actual payment — that's the fundamental line separating them from an LC, and it's why they sit structurally closer to TT's risk profile than to an LC's, even though the paperwork moves through banks in both cases.

A practical framework for choosing between them

There's no single instrument that's correct for every deal; the right choice depends on a handful of factors that are worth weighing together rather than relying on habit or whatever the counterparty proposes first.

How well the two sides know each other matters more than almost anything else. A new counterparty with no track record gives neither side evidence the other will actually perform, which leans the decision toward an LC, or at minimum D/P, so that document and payment control offset the lack of trust. A long, established relationship with a consistent payment history shifts that calculus — the bank cost and administrative workload of an LC become harder to justify once trust has already been built through repeated, successful transactions, and TT becomes the more proportionate choice.

Order value relative to the size of the business matters independently of relationship length. A large order — large relative to either party's normal scale, not in absolute terms — warrants more security regardless of how long the parties have worked together, simply because the amount at risk if something goes wrong is disproportionate to what either side can comfortably absorb.

Country and counterparty risk is a separate axis. Political or economic instability in the counterparty's country, sudden currency controls, or genuine uncertainty about a company's standing all push toward an instrument backed by a bank's own undertaking rather than one that depends entirely on the counterparty's continued willingness and ability to pay.

Finally, whether the buyer needs credit shapes the choice on its own. A buyer that needs time between receiving the goods and paying for them points toward a usance LC or D/A rather than an upfront TT structure, since both of those instruments build a financing period into the transaction itself rather than requiring the buyer to fund the purchase entirely out of pocket before or at shipment.

None of these factors works in isolation — a low-risk country paired with a brand-new, unverified counterparty and a large order still argues for documentary security, for instance — but weighing them together, rather than defaulting to whatever payment term was used last time, is what actually protects the side with less visibility into the other's operations.

What to check the day the LC arrives, before production starts

The most useful moment to catch a workability problem is the day a draft LC arrives, before the exporter commits to production, not after goods are already moving toward the terminal.

The exporter should read the LC's latest shipping date against what production and booking can realistically deliver, not against what seemed reasonable when the sale contract was first negotiated. The transhipment clause needs to be checked against the routing the exporter's forwarder can actually offer to the discharge port named in the LC — if that routing genuinely requires transhipment, a no-transhipment LC needs to be flagged before acceptance, not discovered at booking. The insurance requirement needs to be read for exactly what type and level of cover it calls for, and for who is responsible for arranging it, so there's no ambiguity about timing or scope. The presentation period should be checked against how long it realistically takes, from this specific origin and for this specific product, to assemble every document the LC lists — including any that come from a third party, like a certificate of origin or an inspection certificate, since those are the ones most likely to take longer than expected. And the goods description, quantities, and any special conditions in the LC need to be checked word for word against what will actually appear on the commercial invoice, since that's exactly the kind of gap that produces a discrepancy months later.

Where any of this doesn't match what's physically achievable, the right response is to request an amendment immediately, while there's still room to negotiate a workable term, rather than hoping the mismatch somehow resolves itself once the shipment is underway. An amendment requires the applicant's agreement, so raising the issue early — while the buyer still has an interest in getting the deal done smoothly — gives it a real chance of being accepted. Waiting until the shipment date is close, or worse, until documents are already being prepared for presentation, leaves far less room to fix what should have been caught on day one.

Where this sits in the overall shipment

Payment method and freight are not two separate conversations that happen to touch at the Bill of Lading — they're the same conversation, seen from two directions. Whether TT, LC, D/P, or D/A governs a deal decides which document the carrier needs to issue as an original, whether telex release is even on the table, what routing and shipping dates are actually negotiable once a credit is opened, and how much slack exists in the schedule for anything to go wrong before the money moves.

A freight forwarder brought in early — ideally before an LC is finalized, not after — is in a position to flag exactly the freight-side conflicts this article has described: a latest shipping date the carrier's schedule can't support, a no-transhipment clause on a route that has none direct, an insurance requirement that needs lead time to arrange. Catching those at the negotiation stage costs nothing but a conversation. Catching them after the LC is open, or worse, after the goods have shipped, costs time, leverage, and in the worst case, the payment itself.