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Letters Of Credit Guide: 6-Step Process And Key Types

Navigate documentary requirements and secure financing across global trading markets.

Sneha Tete
PUBLISHED AUG 12, 2026
10 MIN READ

Understanding Letters of Credit in International Trade

A letter of credit is one of the most important financial instruments in international trade, serving as a contractual commitment that bridges the gap between buyers and sellers operating across different countries and time zones. At its core, a letter of credit is a commitment issued by a financial institution, typically a bank, on behalf of a buyer (the applicant) to pay a seller (the beneficiary) a specified amount of money, provided that the seller submits the required documentation proving that the goods have been shipped or services have been rendered according to the terms agreed upon.

In the complex world of international commerce, where trust between parties may be limited and legal systems differ significantly, letters of credit provide a critical mechanism for reducing risk and facilitating transactions. The letter of credit essentially substitutes the credit of the bank for the credit of the buyer, giving the seller confidence that payment will be received even if the buyer encounters financial difficulties or attempts to renege on their obligations.

What Exactly is a Letter of Credit?

A letter of credit functions as a formal payment guarantee in international trade transactions. When an exporter agrees to sell goods to a foreign importer, the exporter naturally wants assurance that payment will be received upon shipment. Conversely, the importer wants to ensure that they are not paying for goods before confirming that the products meet their specifications and have actually been shipped.

The letter of credit resolves this tension by creating a structured payment process. The importer’s bank issues the letter of credit based on the importer’s request and creditworthiness. This document is then transmitted to the exporter’s bank, which verifies its authenticity and communicates it to the exporter. Once the exporter ships the goods and submits the required documentation to their bank, the importer’s bank is obligated to pay, regardless of whether the importer has the funds available or changes their mind about the purchase.

This arrangement protects both parties. The exporter gains a payment guarantee from a reputable financial institution rather than relying solely on the importer’s creditworthiness. The importer, meanwhile, retains leverage to ensure that goods matching the agreed specifications are actually shipped before payment is released.

Key Types of Letters of Credit

Different international transactions require different structures of letters of credit. Understanding the various types helps businesses select the most appropriate instrument for their specific circumstances:

Revocable vs. Irrevocable Letters of Credit

A revocable letter of credit can be modified or cancelled by the issuing bank or the buyer at any time without notifying the seller. While this provides flexibility for the buyer, it offers minimal protection to the seller, as payment is not guaranteed. Irrevocable letters of credit, by contrast, cannot be changed or cancelled without the explicit consent of all parties involved. This provides stronger protection to the exporter and is the most commonly used form in international trade.

Confirmed vs. Unconfirmed Letters of Credit

An unconfirmed letter of credit carries the commitment of only the issuing bank (typically the importer’s bank). A confirmed letter of credit, however, includes an additional guarantee from the exporter’s bank. This second layer of commitment makes confirmed letters of credit more secure for exporters, particularly when dealing with banks in countries with uncertain political or economic stability.

Sight vs. Time Letters of Credit

Sight letters of credit require payment to be made upon presentation of compliant documents, without any waiting period. Time letters of credit, also called usance letters of credit, specify a future date for payment, such as 30, 60, or 90 days after document presentation. Time letters of credit can be advantageous for importers seeking extended payment terms.

Standby Letters of Credit

Unlike traditional commercial letters of credit tied to the shipment of goods, standby letters of credit function more like insurance policies. They are used when a primary obligation may not be fulfilled, such as in loan agreements, performance bonds, or other financial commitments.

The Letter of Credit Process: Step-by-Step

The typical journey of a letter of credit involves multiple stages and several parties working in coordination:

1. Sales Agreement and Application

The process begins when the exporter and importer agree on the terms of the sale, including the product specifications, quantity, price, delivery terms, and payment method. Once both parties commit to using a letter of credit, the importer applies to their bank with a formal request to open the letter of credit. The importer must provide their bank with information about the transaction and proof of their creditworthiness.

2. Letter of Credit Issuance

The importer’s bank, known as the issuing bank, drafts the letter of credit based on the sales agreement terms and conditions. This document contains detailed specifications about what must be presented for payment, including the type of goods, quantities, prices, shipping terms, and required documentation such as bills of lading, invoices, certificates of origin, and insurance documents.

3. Transmission and Review

The issuing bank transmits the letter of credit to the exporter’s bank, known as the advising bank or confirming bank. The exporter’s bank reviews the document to ensure it complies with standard banking practices and is consistent with the agreed-upon transaction terms. The exporter’s bank then notifies the exporter that the letter of credit has been received and is available for use.

4. Shipment and Document Preparation

Upon receipt of the letter of credit, the exporter proceeds with shipping the goods according to the specified terms. Simultaneously, the exporter (often with assistance from freight forwarders and customs brokers) prepares all required documents meticulously. Any discrepancies or errors in these documents can result in the issuing bank refusing to pay, causing significant delays and complications.

5. Document Submission and Verification

The exporter submits all required documents to their bank within the time frame specified in the letter of credit. The advising or confirming bank carefully reviews these documents for compliance with the letter of credit terms. This examination is highly technical and focuses on whether the documents precisely match the requirements, not on the actual condition or quality of the goods themselves.

6. Payment Authorization and Release

Once the exporter’s bank confirms that all documents comply with the letter of credit requirements, it submits the complying documents to the issuing bank. The importer’s bank then releases payment to the exporter’s bank, which credits the exporter’s account. The importer’s bank simultaneously releases the documents to the importer, allowing them to claim the goods from the carrier and clear customs.

Advantages of Using Letters of Credit

Letters of credit offer several compelling benefits that explain their continued widespread use in international trade:

Disadvantages and Challenges

Despite their benefits, letters of credit come with significant drawbacks that businesses should carefully consider:

When to Use a Letter of Credit

While letters of credit provide valuable protections, they are not appropriate for every transaction. Exporters and importers should consider using letters of credit in the following situations:

Best Practices for Managing Letters of Credit

To maximize the benefits and minimize the problems associated with letters of credit, businesses should follow these best practices:

Comparison of Payment Methods in International Trade

Payment Method Exporter Security Importer Security Cost Processing Time
Letter of Credit Very High High High (1-3%) 5-10 days
Cash in Advance Very High Very Low Low 1-2 days
Open Account Low Very High Low 1-2 days
Documentary Collection Medium Medium Low-Medium 3-7 days

Frequently Asked Questions About Letters of Credit

Q: Who pays for the letter of credit?

A: Typically, the importer (buyer) pays the fees associated with opening and maintaining the letter of credit, as it is requested by the importer. However, in some cases, these costs may be negotiated and shared between the buyer and seller based on the bargaining power and market conditions.

Q: How long does the letter of credit process take?

A: The entire process typically takes between 5 to 10 business days from the time the importer applies for the letter of credit to when the exporter receives payment. This timeline can vary depending on the complexity of the transaction, the efficiency of the banks involved, and how quickly documents are prepared and submitted.

Q: What happens if documents have discrepancies?

A: If the submitted documents contain discrepancies or errors, the issuing bank will typically reject them and notify the exporter of the discrepancies. The exporter then has the opportunity to correct the documents and resubmit them. However, this process causes delays in payment, and the exporter may incur additional fees.

Q: Can a letter of credit be transferred to another party?

A: Some letters of credit are issued as transferable, which allows the exporter to transfer the credit to a third party, such as a supplier. This is useful in situations where an exporter is acting as a middleman in the transaction. However, only certain types of letters of credit can be transferred, and specific conditions must be met.

Q: Are letters of credit used in domestic transactions?

A: While letters of credit are primarily used in international trade, they can occasionally be used in domestic transactions where there are concerns about creditworthiness or when large, high-value transactions are involved. However, they are far less common domestically because parties typically have better credit information and legal recourse options available.

Q: What is the difference between an advised and a confirmed letter of credit?

A: An advised letter of credit is one where the exporter’s bank simply notifies the exporter of the credit issued by the importer’s bank but does not add its own commitment. A confirmed letter of credit includes a commitment from both the importer’s bank and the exporter’s bank to pay, providing an additional layer of security for the exporter.

References

  1. Letter of Credit — U.S. International Trade Administration. 2024. https://www.trade.gov/letter-credit
  2. The Uniform Customs and Practice for Documentary Credits (UCP 600) — International Chamber of Commerce. 2007. https://iccwbo.org/
  3. Export Guide: Letter of Credit Basics — U.S. International Trade Administration. 2024. https://www.trade.gov/
  4. Understanding International Trade Finance — World Bank Trade Finance Program. 2023. https://www.worldbank.org/
  5. Documentary Credits for Importers and Exporters — Asian Development Bank. 2022. https://www.adb.org/

This article is general information, not personal financial advice. Consider your own situation, or speak with a licensed adviser, before acting on it.

Sneha Tete
About the author

Sneha Tete

Sneha Tete writes for BuildTheFund. Every figure is verified against primary sources per our editorial policy.

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