The Paradox Nobody Puts in the Same Article
A letter of credit is simultaneously declining and surging. Roughly 12.5% of world trade moves under letters of credit, per research by Niepmann and Schmidt-Eisenlohr, a share that has shrunk for a decade as open-account terms replaced it in mature corridors. Yet as of May 2026, HSBC reported that demand for standby LCs and other trade-finance products had risen steadily over the prior six to nine months, driven by currency volatility and counterparty risk in emerging markets.
Low-risk corridors between established trading partners keep moving toward open account, since a letter of credit adds fees nobody wants to pay when trust already exists. High-risk corridors (new counterparties, unstable currencies, sanctions-exposed banks) move the opposite direction, because the LC's value is replacing trust with a paper trail a bank stands behind. Volume isn't falling or rising uniformly; it's sorting by risk level.
What a Letter of Credit Actually Guarantees
A letter of credit is a documentary payment mechanism, not a performance guarantee. The issuing bank pays against presented documents (bill of lading, commercial invoice, packing list, certificate of origin) not against whether the cargo matches what's on paper. Banks examine paper; they do not inspect cargo. Most failures start here: an exporter can ship exactly what was ordered and still get rejected because a date format doesn't match the LC terms, or because a bill of lading was signed by an agent instead of the carrier.
The Real Risk Isn't Bank Default. It's Documentary Rejection
Most letter of credit guides frame risk as "will the bank pay." The bigger risk is "will the bank find a reason not to pay this presentation." A study of 500 documentary-credit files found only 135 presentations (27%) complied fully with LC requirements on first submission, with documentary defects in 85.4% of files (Letter of Credit: Importance and Difficulties study). A separate 2026 trade-finance analysis puts first-presentation rejection rates at 60-75%, with each discrepancy generating roughly $75-150 in fees on top of the delay (ShipScout LC export guide).
On a trade with five or six documents, that's hundreds of dollars in fees and days of re-presentation before the exporter sees payment. The practical takeaway: budget for a second presentation as the default outcome, not the exception, if your process assumes first-time compliance, your cash flow forecast is wrong most of the time.
UCP 600 vs. ISP98: Picking the Wrong Rulebook Breaks the Deal
Two rule sets govern letters of credit, and using the wrong one is a recurring, preventable failure:
- UCP 600 governs documentary credits, the standard commercial LC used to pay for goods, where the bank examines shipping documents against the credit terms.
- ISP98 governs standby letters of credit, instruments meant as a backstop, paid only if the underlying obligation (a loan, a performance bond, a lease) is *not* met.
Applying UCP 600 mechanics to a standby LC, or vice versa, produces document requirements that don't match the instrument's actual function. A standby LC drafted under UCP 600 language can end up requiring shipping documents for a transaction that was never about shipping goods at all. Confirm the governing rules in the credit text before drafting the underlying contract, not after.
Confirmed vs. Unconfirmed: The Difference a Second Signature Makes
An unconfirmed letter of credit relies entirely on the issuing bank's creditworthiness and good faith. A confirmed letter of credit adds a second bank (usually in the exporter's own country) that guarantees payment independently of the issuing bank. A Hong Kong exporter shipped goods to Bangladesh under a 90-day unconfirmed LC; the issuing bank later produced a fraudulent SWIFT payment message, leaving the exporter exposed to non-payment with no second bank to fall back on (LinkedIn case study).
In a separate case, a European commodities exporter shipping to North Africa under irrevocable LCs faced outright bank refusal to pay. It took legal action before the bank paid the full multimillion-pound amount plus interest, waived commissions, and covered legal costs (LexLaw). Both cases involved irrevocable credits, irrevocability means the bank can't cancel the credit unilaterally, not that it will honor it without a fight. Confirmation is the layer that protects against exactly this scenario, and it costs a fee most exporters skip until after they've been burned once.
Why Letter of Credit Volume Tracks Trade Shocks
Global trade fell 16% year-over-year in April 2020 and 18% in May 2020, with U.S. exports falling 30% and 35% in those same months (CEPR/PMC trade insurance study). During that window, a one-standard-deviation increase in LC intensity was associated with a 1.3-log-point larger increase in monthly U.S. exports between February and August 2020, corridors with heavier letter of credit usage held up better as counterparty trust collapsed elsewhere. Bangladesh's LC data confirms the pattern at country scale: openings slumped 26% in FY2022-23 to $69.36 billion from $94.26 billion, amid foreign-exchange shortages and import restrictions (The Daily Star), then rose 18% to $13.94 billion in July-August 2026 alone, up from $11.82 billion a year earlier (Dhaka Tribune). Volume swings this large, this fast, aren't a dying instrument. They're a stress gauge.
The Underlying Problem Is Verification, Not the Instrument
Every failure mode above, the 60-75% first-rejection rate, the unconfirmed-LC fraud exposure, the wrong-rulebook mismatch, traces back to the same root cause: banks are verifying paper, not the underlying event the paper claims to describe. A bill of lading can be internally consistent and still describe cargo that was never loaded. A SWIFT message can look authentic and still be fabricated, as the Hong Kong case showed. The letter of credit system was built in an era with no better option than trusting the document in front of you.
That's the gap EDMA Group's verification infrastructure is built to close, independent, staked attestors verifying the underlying claim against source evidence before any downstream action can clear, so the question stops being "does this document look right" and becomes "was this event actually verified." If you're evaluating how trade finance risk gets re-architected rather than just re-papered, that's the problem worth watching.
Bottom Line
A letter of credit still does one thing no open-account term can: it puts a bank's payment obligation between you and a counterparty you don't fully trust. But the data is clear that the bank's signature is not where deals fail, the documents are. Budget for re-presentation, confirm the right rule set before you draft, and pay for confirmation on any unconfirmed credit from a bank you haven't dealt with before.
Ready to see how verified claims replace paper-based trust in trade finance? Get in touch with our team to talk through your corridor.
