Comprehensive Guide to Letters of Credit

What is a Letter of Credit?

A Letter of Credit (LC), often referred to as a documentary credit, is a financial instrument issued by a bank or financial institution that guarantees a buyer’s payment to a seller will be received on time and for the correct amount. If the buyer is unable to make payment on the purchase, the bank will cover the full or remaining amount of the purchase.

In essence, the Letter of Credit substitutes the creditworthiness of the buyer with that of the bank. It is a cornerstone instrument in international trade, though it is also used in domestic transactions. The LC serves as a mechanism to mitigate risk for both parties in a transaction: the seller is assured they will get paid provided they meet the terms specified in the document, and the buyer is assured that payment will not be released until the seller has complied with those terms (usually by providing shipping documentation).

How It Works

The mechanism of an LC involves several parties:

The Applicant (Buyer/Importer): The party who applies to the bank for the LC.
The Beneficiary (Seller/Exporter): The party who receives the LC and is entitled to payment.
The Issuing Bank: The bank that issues the LC on behalf of the applicant.
The Confirming Bank (optional): A bank, usually in the seller's country, that adds its guarantee to the LC, promising to pay even if the issuing bank defaults.
The Advising Bank (optional): A bank, usually in the seller's country, that authenticates the LC and forwards it to the beneficiary but does not necessarily guarantee payment.

The process begins when the buyer and seller agree to a sale, often following a detailed business proposal or a finalized contract. The buyer applies for the LC at their bank. The issuing bank sends the LC to the advising bank, which notifies the seller. Once the seller ships the goods, they submit documents (like a bill of lading) proving the shipment to the bank. If the documents comply strictly with the LC terms, the bank pays the seller and seeks reimbursement from the buyer.

Irrevocable vs. Revocable

The vast majority of Letters of Credit used today are Irrevocable. This means the terms of the credit cannot be amended or canceled without the express consent of all parties involved: the buyer, the seller, and the issuing bank. This provides the necessary security for the seller to commit resources to manufacturing and shipping goods.

Revocable Letters of Credit are rare. They can be altered or canceled by the issuing bank (and the buyer) at any time without prior notice to the beneficiary. Because they offer zero security to the seller, they are seldom used in modern commercial trade and are generally discouraged.

When to Use a Letter of Credit

While there are many payment methods available in commerce—such as wire transfers, open accounts, or documentary collections—an LC is the preferred method in specific high-risk or high-value scenarios.

1. New Business Relationships

When a buyer and a seller are working together for the first time, there is a distinct lack of trust. The seller fears the buyer will not pay, and the buyer fears the seller will not deliver the goods. An LC bridges this trust gap. It allows the seller to feel secure in shipping goods to a stranger, while allowing the buyer to ensure they are not paying for goods that do not exist.

2. International Trade

International transactions introduce significant risks: currency fluctuations, distance, differing laws, and difficulty in enforcing legal judgments. If an exporter in Germany ships goods to a buyer in Brazil, and the Brazilian buyer refuses to pay, the German company faces a legal nightmare to recover funds. An LC neutralizes this risk by placing the burden of payment on the banks involved.

3. High-Value Transactions

For transactions involving significant capital, the financial exposure is too great to rely on open account terms (where the buyer pays later). If a deal involves hundreds of thousands or millions of dollars, the assurance of a bank guarantee is usually a prerequisite.

4. Regulatory or Contractual Requirements

Sometimes, the use of an LC is mandated by law or specific trade agreements. For example, certain governments require importers to use LCs to monitor capital outflows. Similarly, large construction contracts often require performance bonds or LCs to ensure contractors fulfill their obligations.

5. Unknown Creditworthiness

If the buyer has a limited credit history or is located in a country with a volatile economic or political climate, the seller will likely demand an LC. The bank's involvement effectively vettes the buyer's creditworthiness for the seller, as the bank will not issue the LC unless it is confident in the buyer's ability to pay (or unless the buyer provides sufficient collateral).

Key Components and Sections

A Letter of Credit is a highly structured document. The precision of its language is critical because banks deal in documents, not goods. If the documents do not match the LC terms exactly, the bank will refuse payment. Below are the essential components found in a standard LC.

1. Identification Number and Date

Every LC must have a unique reference number assigned by the issuing bank. This number is used on all correspondence and amendments. The issue date is also crucial as it marks the validity of the credit and the start of any time frames for shipment.

2. Parties Involved

Applicant: Full name and address of the buyer.
Beneficiary: Full name and address of the seller.
Issuing Bank: Name, address, and SWIFT code of the bank issuing the LC.
Advising/Confirming Bank: Details of the bank corresponding with the beneficiary.

3. Type and Expiry Date

The document must state if it is irrevocable (standard) or revocable. It must also specify an expiry date and location. This is the final day by which the beneficiary must present documents to the bank for payment. If the documents arrive late, even by one hour, payment can be refused.

4. Amount and Currency

The LC must specify the exact amount available for the beneficiary (e.g., USD 50,000). This may be a fixed amount or have a tolerance percentage (e.g., "10% more or less" allowed) to accommodate minor discrepancies in final invoices.

5. Available With... By...

This clause defines where and how the beneficiary can draw funds.

Available with: The bank authorized to honor the presentation (usually the advising bank).
By: The method of payment, such as:
- Payment at sight (paid immediately upon compliant presentation).
- Deferred Payment (paid at a future date).
- Acceptance (acceptance of drafts/bills of exchange).
- Negotiation (the bank purchases the documents).

6. Drafts (Drawee)

This indicates on whom the drafts (orders to pay) are drawn. In many cases, drafts are drawn on the issuing bank, but sometimes they are drawn on the buyer.

7. Partial Shipments and Transshipment

The LC must explicitly state whether partial shipments (sending the goods in multiple lots) are allowed or prohibited. It must also state whether transshipment (moving goods from one vessel to another en route) is permitted. If the LC says "prohibited," any evidence of transshipment will cause a discrepancy.

8. Port of Loading/Discharge

For sea freight, the LC must name the specific port of loading (e.g., Port of Shanghai) and the port of discharge (e.g., Port of Los Angeles). For air freight, it will specify the airport of departure and destination. Precision is vital; "Shanghai" vs. "Shanghai, China" can technically be a discrepancy.

9. Latest Shipment Date

This is the final date on which the goods can be shipped. It is usually earlier than the expiry date to allow time for the beneficiary to gather and present documents.

10. Description of Goods

The LC must contain a description of the goods, including quantity, unit price, and type. This description should be concise but accurate enough to match the commercial invoice. However, it is best to avoid excessive detail here to minimize the risk of discrepancies.

11. Documents Required

This is the most critical section for the seller. It lists the exact documents the seller must present to receive payment. Common documents include:

Commercial Invoice
Bill of Lading (or Air Waybill)
Insurance Certificate (if the LC is CIF/CIP)
Certificate of Origin
Packing List
Inspection Certificate

12. Instructions to the Paying/Accepting/Negotiating Bank

This section outlines how the reimbursing bank will handle the documents and whether they are to be forwarded to the issuing bank.

13. Governing Rules

Most LCs state they are subject to the Uniform Customs and Practice for Documentary Credits (UCP 600). This is a set of internationally recognized rules published by the International Chamber of Commerce (ICC) that standardize how LCs are handled.

How to Write a Letter of Credit (step by step)

Writing a Letter of Credit is rarely done by the seller or buyer directly. Instead, the buyer (applicant) submits an application to their bank, and the bank issues the actual LC. However, the terms of the LC originate from the sales contract negotiated by the buyer and seller. Therefore, "writing" an LC effectively means drafting the application correctly to ensure the seller gets paid and the buyer gets the goods they ordered.

Step 1: Establish the Sales Agreement

Before approaching a bank, the buyer and seller must agree on the terms of trade. This is usually codified in a Purchase Agreement or a Proforma Invoice. This document should specify:

The Incoterms (e.g., FOB, CIF, EXW) which define shipping responsibilities.
Payment terms (e.g., 100% at sight, or deferred 60 days).
Required documentation (Does the seller need to provide an inspection certificate?).

Step 2: The Buyer Applies for the LC

The buyer (Applicant) completes an "Application for Irrevocable Documentary Credit" at their bank. The buyer must provide:

Credit Arrangement: The bank will check the buyer's credit line. If the buyer does not have sufficient credit, they must deposit cash or collateral as security.
The Application Form: This form contains the details the bank will use to generate the LC.

Step 3: Drafting the Terms (Crucial Phase)

When filling out the application, the buyer must translate the sales contract into banking language. Here is how to approach specific sections:

Description of Goods:

Bad Draft: "High-quality leather shoes, size 10, brown color, comfortable."
Good Draft: "Men's leather shoes, Style #45B, Brown, Size 10, 500 pairs at USD 50.00 per pair CIF New York."
Why: The "Good" draft is verifiable. "Comfortable" is subjective and will cause banks to reject documents.

Incoterms: Ensure the Incoterms are correctly cited (e.g., "CIF New York Incoterms 2020"). This dictates who pays for freight and insurance.

Documents Required: Be specific but realistic.

Instead of "Bill of Lading," specify "Full set of clean on board ocean Bill of Lading, made out to order of [Issuing Bank], marked 'freight prepaid', notify applicant."
If you require an inspection, specify "Inspection Certificate issued by [Specific Company or Independent Inspector] signed by [Name]."

Dates: Calculate backwards.

When do you need the goods? Subtract shipping time.
That gives you the Latest Shipment Date.
Subtract the time needed for the seller to produce documents after shipment (usually 3-21 days). This is the Period for Presentation.
This gives you the buffer before the Expiry Date.

Step 4: Bank Review and Issuance

The bank reviews the application for financial risk and operational clarity. If the bank approves, it issues the LC via the SWIFT network. It sends the LC to an Advising Bank in the seller's country.

Step 5: Advising and Confirmation

The Advising Bank verifies the authenticity of the LC and forwards it to the Beneficiary (Seller).

If the LC is "Unconfirmed," the Advising Bank acts only as a messenger.
If the LC is "Confirmed," the Advising Bank adds its own guarantee. This is often requested by sellers in developing nations to mitigate the risk of the issuing bank (and the buyer's country) failing to pay.

Step 6: Seller Review and Acceptance

Upon receipt, the seller must review the LC immediately. They must compare the LC terms against their sales contract and their production capabilities. If the terms are unacceptable (e.g., the shipment window is too tight, or documents are impossible to obtain), the seller must request an Amendment immediately.

Step 7: Shipment and Presentation

Once the seller ships the goods, they collect the documents listed in the LC. They present these documents to the bank (nominated in the LC) within the specified time frame.

Step 8: Examination and Payment

The bank examines the documents against the LC terms (the "Strict Compliance" principle). If there are no discrepancies:

In a "Sight" LC, the bank pays immediately.
In a "Deferred" LC, the bank accepts a time draft and promises to pay on the maturity date.

Step 9: Reimbursement and Release

The bank forwards the documents to the issuing bank. The issuing bank checks them again and reimburses the negotiating bank. The issuing bank then presents documents to the buyer to claim reimbursement. The buyer uses the documents (specifically the Bill of Lading) to take possession of the goods.

Common Mistakes to Avoid

Letters of Credit are notorious for discrepancies—minor errors that result in refused payment. These errors can be costly, delaying cash flow and incurring extra fees. Here are the most common pitfalls:

1. The "Typo" Discrepancy

Banks are bound by the "Doctrine of Strict Compliance." They examine documents character by character.

Mistake: The LC lists the beneficiary as "Acme Corp," but the invoice says "Acme Corporation."
Mistake: The Bill of Lading says "Port of New York," but the LC says "Port of Newark" (when they are effectively the same terminal complex).
Consequence: The bank will refuse payment until the seller provides corrected documents or the buyer waives the discrepancy.

2. Inconsistent Incoterms

The LC must match the contract. If the contract says FOB (Free On Board), the seller is not responsible for insurance. However, if the LC requires an "Insurance Certificate," the seller cannot provide it because they don't hold the insurable interest. This creates an impossible condition.

3. Missing the "Latest Shipment Date"

If the goods leave the origin one day after the "Latest Shipment Date," the LC is effectively dead. The bank will not pay, even if the goods arrive at the destination perfectly.

4. Expiry Date Too Close to Shipment Date

Buyers sometimes try to minimize bank fees by shortening the validity of the LC. If the seller ships on the 15th, the 16th is a holiday, and the 17th is the expiry date, the seller may not have enough time to get the documents to the bank. Standard practice is to allow at least 21 days after shipment for presentation of documents.

5. Vague Document Requirements

Vague: "Certificate of Origin."
Risky: If the LC doesn't specify who issues it, the seller might provide one from a local chamber of commerce, but the customs authority in the destination country might reject it, causing the buyer to refuse the documents.
Better: "Certificate of Origin issued by the Chamber of Commerce, legalized by the consulate."

6. Incorrect Consignee Details

The Bill of Lading is a title document. If the LC says the Bill of Lading should be "To order of Issuing Bank," but the shipper issues it "To order of Shipper," the buyer cannot legally take possession of the goods without the shipper's endorsement, which complicates the release.

Tips for Success

Successfully navigating the Letter of Credit process requires preparation, attention to detail, and communication.

1. Involve Your Bank Early

Before finalizing the sales contract, both buyer and seller should speak to their respective banks. Ask about specific requirements for the country involved, currency regulations, and typical document formats. A banker can review a draft LC application to spot "red flags" before it is issued.

2. Use a Freight Forwarder

Experienced freight forwarders understand LCs. They know exactly how to prepare the Bill of Lading to match the LC requirements (e.g., "Clean on Board," "Freight Prepaid," correct_notify party). An error in the Bill of Lading is the most common cause of LC discrepancies.

3. Automate the Check

If you are a seller dealing with high volumes of LCs, use document checking software. These programs compare the data fields in the LC against the scanned documents to highlight spelling differences, date errors, or mathematical mismatches before submission.

4. Keep the Terms Simple

Do not use the LC to enforce quality control. An LC is a financial instrument, not a quality assurance tool. For example, do not write in the LC: "Goods must be fresh."

Better: "Goods must have an expiry date not earlier than [Date]."
Why: A banker cannot judge "freshness," but they can read a date. For complex quality specifications, use a third-party inspection certificate as a required document.

5. Communicate Immediately

If a discrepancy is found, time is of the essence. The buyer must decide quickly whether to "waive" the discrepancy (accept the error and pay) or reject the documents. Delays in communication can result in goods sitting at a port, accruing massive demurrage and storage charges.

6. Understand UCP 600

You do not need to be a lawyer, but understanding the basics of UCP 600 (the universal rules for LCs) is vital. For example, knowing that banks have a maximum of 5 banking days to examine documents helps you manage cash flow expectations.

7. Keep a "Master Copy"

For sellers, keep a file of all your standard documents (invoices, packing lists). When you receive an LC, compare it against your standard templates to see what needs to be changed. This prevents you from inadvertently using an old template with outdated address details or payment terms.

Example Letter of Credit

Below is a simplified, realistic example of an Irrevocable Letter of Credit. Note the formal tone and specific details.

ISSUING BANK: Global National Bank, New York Branch ADVISING BANK: Pacific Commerce Bank, Tokyo APPLICANT: American Imports LLC, 123 Market St, New York, NY 10001 BENEFICIARY: TechSource Co., Ltd., 456 Electronics Blvd, Tokyo, Japan

DATE OF ISSUE: October 1, 2023 EXPIRY DATE: December 15, 2023 PLACE OF EXPIRY: At the counters of Pacific Commerce Bank, Tokyo

CREDIT NUMBER: LC-2023-GNB-8842 AMOUNT: USD 100,000.00 (One Hundred Thousand US Dollars) Say US Dollars One Hundred Thousand Only.

PARTIAL SHIPMENTS: PROHIBITED TRANSSHIPMENT: ALLOWED

LATEST SHIPMENT DATE: November 30, 2023

SHIPMENT FROM: Port of Tokyo, Japan SHIPMENT TO: Port of New York, USA

DESCRIPTION OF GOODS: 5,000 Units of "Model X" Wireless Headphones, Color: Black. Unit Price: USD 20.00 per unit CIF Port of New York, Incoterms 2020.

DOCUMENTS REQUIRED:

Signed Commercial Invoice in 5-fold certifying that goods are in accordance with Applicant's Purchase Order #9988.
Full Set (3/3) of Clean On Board Ocean Bill of Lading, made out to the order of Global National Bank, marked "Freight Prepaid" and notify American Imports LLC.
Insurance Policy/Certificate for 110% of CIF value, covering Institute Cargo Clauses (A), showing claims payable in New York, USA.
Packing List in 3-fold.
Certificate of Origin issued by the Chamber of Commerce of Japan.

PERIOD FOR PRESENTATION: Documents must be presented within 15 days after the date of shipment but within the validity of the credit.

INSTRUCTIONS TO THE ADVISING BANK: Please advise the beneficiary of this Irrevocable Documentary Credit adding your confirmation.

THIS CREDIT IS SUBJECT TO UCP 600 (2007 REVISION).

Authorized Signature, Global National Bank

Frequently Asked Questions

1. What is the difference between a Letter of Credit and a Bank Guarantee? While both provide security, they function differently. A Letter of Credit is primarily a payment mechanism; it ensures the seller gets paid for a specific transaction. A Bank Guarantee is a risk mitigation tool; it ensures that if one party fails to fulfill a contractual obligation (like completing a construction project), the bank will pay the other party a specified sum as compensation.

2. What happens if the documents presented do not match the LC terms? This is called a "discrepancy." The bank has the right to refuse payment. The bank will typically send a "Discrepancy Notice" to the beneficiary. The beneficiary can try to correct the documents (if time allows) or ask the applicant to waive the discrepancy. If the applicant waives it, the bank may proceed with payment.

3. Can a Letter of Credit be cancelled? If it is an Irrevocable Letter of Credit (the standard), it cannot be cancelled or amended without the consent of all parties: the applicant, the beneficiary, and the issuing bank. If the buyer wants to cancel the deal, the seller must agree to cancel the LC first.

4. What does "UCP 600" stand for? UCP 600 stands for Uniform Customs and Practice for Documentary Credits, publication number 600. It is a set of rules established by the International Chamber of Commerce (ICC) that governs how Letters of Credit are interpreted and used by banks worldwide. Almost all LCs explicitly state they are subject to UCP 600 to ensure uniformity.

5. Is a Letter of Credit expensive? Yes, LCs involve fees. The applicant (buyer) pays an issuance fee based on the credit amount and a validity fee. The beneficiary (seller) pays advising fees and possibly a confirmation fee if they request that service. There are also fees for amendments and discrepancies. Because of these costs, LCs are usually not used for small, low-value transactions.

Letter of Credit

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