A letter of credit is a bank’s written promise to pay a seller once the seller hands over documents proving the goods were shipped as agreed. The buyer arranges it through its own bank, effectively swapping the buyer’s promise to pay for the bank’s stronger financial guarantee. It exists because international trade puts two strangers on opposite sides of the world into a deal where the seller doesn’t want to ship without payment and the buyer doesn’t want to pay without proof of shipment. The bank sits in the middle, paying the seller against paperwork and then collecting from the buyer.
Who Is Involved
A basic letter of credit has four parties, and more complex ones add a fifth or sixth.
- Applicant (buyer): The importer who asks its bank to issue the credit and who ultimately reimburses the bank.
- Beneficiary (seller): The exporter who gets paid, provided the documents match the credit’s terms exactly.
- Issuing bank: The buyer’s bank. It writes the letter of credit and takes on the legal obligation to pay the seller. It evaluates the buyer’s creditworthiness and usually requires collateral or a cash deposit first.1Documentary Credits Definitions. Key Points – Chapter 3 Roles and Responsibilities
- Advising bank: A bank in the seller’s country that authenticates the credit and forwards it to the seller. It has no obligation to pay.2Allianz Trade. Letter of Credit: Definition, Process, and Different Types Explained – Section: Key Participants in Letters of Credit
Two more banks can join the transaction when circumstances call for them. A confirming bank adds its own irrevocable promise to pay on top of the issuing bank’s, which the seller may want when the issuing bank sits in a politically unstable country or has a weak credit rating.1Documentary Credits Definitions. Key Points – Chapter 3 Roles and Responsibilities The confirming bank is usually a major international institution and charges a fee that scales with the risk of the issuing bank’s country. A negotiating bank is a nominated bank in the seller’s country that examines the documents, buys them from the seller, and pays the seller upfront before sending everything on to the issuing bank. This gets the seller its money faster, and the negotiating bank takes on the risk that the documents will actually clear.
How the Payment Actually Moves
The process is sequential. Each step has to finish before the next one starts.
The buyer and seller sign a sales contract that specifies payment by letter of credit. The buyer then applies to its bank, giving the key terms: credit amount, expiration date, required documents, and shipping deadline. The issuing bank checks the buyer’s creditworthiness, collects any deposit or collateral, and issues the credit. That issuance is usually transmitted electronically through the SWIFT network as a standardized MT 700 message.3SWIFT. Category 7 Message Reference Guide
The advising bank in the seller’s country receives it, verifies it’s genuine, and passes it to the seller. This is the seller’s moment to read every term carefully. Once the goods ship, it’s too late to renegotiate. If everything looks workable, the seller ships and prepares the required documents. A typical package includes a commercial invoice, a bill of lading, a packing list, and an insurance certificate. What exactly is required depends on the credit.
The seller presents the documents to the advising or negotiating bank, and the examination clock starts. Under UCP 600, the bank has a maximum of five banking days after receiving the documents to decide whether they comply.4ICC Academy. Documentary Credits: Rules, Guidelines and Terminology Earlier rules used a vague “reasonable time” standard that produced disputes; the current version is a hard ceiling, and it means banking days at the bank’s location, not calendar days.
If the documents are clean, they go to the issuing bank, which runs its own five-day compliance check and then pays. The issuing bank debits the buyer’s account and releases the shipping documents, which the buyer needs to collect the goods at the destination port.
The Two Rules That Decide Whether the Bank Pays
Two ideas hold the whole system together. Once you understand them, the rest of the mechanics make sense.
Independence Principle
The bank’s obligation to pay is completely separate from the underlying commercial deal. If the goods arrive defective, that’s a dispute between buyer and seller. The bank still pays as long as the documents check out. A buyer cannot phone the bank and say “don’t pay, I’m unhappy with the quality.” Banks deal with paper, not products. This separation is what makes the instrument reliable.
The rulebook that codifies this is UCP 600, published by the International Chamber of Commerce and used in more than 175 countries.5ICC. UN Endorses ICC Documentary Credit Rules In the United States, letters of credit are also governed domestically by Uniform Commercial Code Article 5, which every state has adopted and which mirrors the same principles.
Strict Compliance
The bank pays only when the seller presents documents that match the credit’s terms exactly. This is called a complying presentation. Banks read shipping documents word by word, and even a small error such as a misspelled company name or a weight that’s off by a fraction can be grounds for refusal.1Documentary Credits Definitions. Key Points – Chapter 3 Roles and Responsibilities Banks are not commodity inspectors. They can’t open a container to check whether the steel coils inside actually match the description. All they can do is verify the paperwork says what the credit says it should.
Strict compliance protects the bank. Pay against perfect documents and no one can hold the bank responsible if the goods turn out to be wrong. The flip side falls on the seller, who has to be a meticulous document preparer. Industry estimates suggest that 60 to 75 percent of first-time document presentations contain at least one discrepancy.
When a discrepancy shows up, the examining bank sends a refusal notice listing every problem. The seller can correct and resubmit if the credit hasn’t expired, ask the bank to forward the documents “on a discrepant basis,” or seek a waiver from the buyer. Waivers are worth pursuing when the discrepancy is trivial. Discrepancy fees fall on the seller, and experienced exporters build extra document preparation time into their shipping schedules for exactly this reason.
Types of Letters of Credit
Commercial (Documentary) Letter of Credit
The standard type used to finance a specific shipment. The seller ships, presents documents, gets paid. The mechanics above describe this type.
Standby Letter of Credit
A standby works in reverse. Instead of financing a trade, it acts as a safety net. The beneficiary draws on a standby only if the applicant fails to perform, for example by defaulting on a loan or not completing a construction project. In normal circumstances the standby is never drawn on and simply expires. Because standbys function more like guarantees than trade finance tools, they’re often governed by a separate set of rules called the International Standby Practices (ISP98), written specifically for standby transactions.6IIBLP. ISP98
Irrevocable vs. Revocable
Under UCP 600, every letter of credit is irrevocable unless it explicitly says otherwise. An irrevocable credit cannot be changed or canceled without the agreement of the issuing bank, the confirming bank if there is one, and the beneficiary.7AustLII. Revocable Credits and the UCP600 Revocable credits effectively disappeared from practice after UCP 600 was adopted in 2007. If someone offers you a revocable letter of credit today, that’s a red flag.
Transferable Letter of Credit
Used by trading companies and middlemen who buy from one supplier and resell to an end buyer. A transferable credit lets the original beneficiary pass payment rights along to the actual supplier. It can only be transferred once, and the second beneficiary generally cannot alter the core terms.1Documentary Credits Definitions. Key Points – Chapter 3 Roles and Responsibilities
Back-to-Back Letter of Credit
An alternative for intermediaries who need more flexibility. The intermediary uses the original (“master”) letter of credit as collateral to have its bank issue a second, separate credit in favor of the supplier. Because two independent credits exist, the intermediary can adjust terms between them: different prices, different shipping dates, different document requirements. The cost is higher complexity and higher fees, with two full LC transactions running in parallel.8ICC Academy. Transferable vs Back-to-Back Letters of Credit: Key Risks and Mitigation Strategies for Banks
Red Clause and Green Clause
A red clause letter of credit lets the seller draw an advance before shipping, which funds production or procurement. The advance is deducted from the final payment when the seller submits compliant documents. A green clause credit extends this further, covering warehousing and freight expenses before shipment as well. Both shift financial risk toward the buyer, who is on the hook if the seller takes the advance but never ships.
What It Costs
Letters of credit are not cheap, and fees stack across multiple parties. The buyer usually pays the issuance fee, which most banks set at roughly 0.75 to 1.5 percent of the credit’s value. The exact rate depends on transaction size, the buyer’s credit strength, and how risky the bank considers the deal.
- Confirmation fee: Charged by the confirming bank when the seller wants a second guarantee; scales with the political and credit risk of the issuing bank’s country.
- Advising fee: A flat fee for authenticating and forwarding the credit to the seller.
- Amendment fee: Any change after issuance, such as extending the expiration date or increasing the amount, triggers a fee from every bank involved.
- Discrepancy fee: Charged to the seller when documents don’t comply.
- Negotiation or payment fee: Charged by the nominated bank for examining documents and paying out.
The issuing bank is making a payment promise backed by its own balance sheet, so it protects itself with collateral from the buyer. Established corporate clients with existing credit lines may simply have the LC amount counted against that line. Newer or riskier applicants often have to post a cash deposit equal to the full LC amount, which freezes the money until the transaction closes. Cash collateral is particularly common for first-time importers and deals involving higher-risk countries.
Risks and How to Protect Yourself
The letter of credit’s greatest strength, that banks examine documents rather than goods, is also its most exploitable weakness. A set of documents can look perfect on paper while the container they describe sits empty at the port.
The most common scheme is presenting forged or falsified documents. Phantom shipments involve a complete set of shipping papers for goods that were never loaded onto a vessel. In cases like this the documents satisfy the credit’s terms on their face and the bank has no practical way to detect the fraud during its five-day examination window. UCC Article 5 explicitly states that an issuer is not responsible for the genuineness of documents that appear on their face to comply. A fraud exception exists that lets a court block payment, but it requires the applicant to prove material fraud and typically involves emergency litigation. By the time fraud is discovered, the beneficiary has often already been paid.
Buyers can build protective terms into the credit itself. Requiring a pre-shipment inspection certificate from an independent surveyor such as SGS or Bureau Veritas adds physical verification that document review alone can’t provide. Sellers should verify the issuing bank’s creditworthiness before shipping. If the issuing bank is unfamiliar or based in a high-risk jurisdiction, requesting confirmation from a reputable local bank is worth the extra cost. Sellers should also confirm the credit’s authenticity through their advising bank before committing resources to production.
Letter of Credit vs. Line of Credit
The abbreviation “LOC” causes confusion, but these are entirely different instruments.
A line of credit is a loan facility. The bank pre-approves a borrowing limit, the borrower draws cash as needed, pays interest on the outstanding balance, and repays over time. The bank’s risk is straightforward credit risk: will the borrower repay? A line of credit shows up as debt on the borrower’s balance sheet.
A letter of credit is a payment mechanism, not a loan. No cash changes hands until the seller proves performance through documents. The bank’s risk is documentary risk: do the papers match the terms? The buyer doesn’t borrow money; the buyer’s bank guarantees payment to a third party. It’s a contingent obligation that sits off the balance sheet until it’s drawn on. A line of credit solves a cash flow need. A letter of credit solves a trust gap between trading partners.