How a Letter of Credit (LC) Works in Import/Export

The Letter of Credit as an Institutional Payment Undertaking

A Letter of Credit (LC), formally a Documentary Credit, represents an irrevocable undertaking issued by a bank (the Issuing Bank) at the request of its client (the Applicant) to make a payment to a third party (the Beneficiary) or to the order of a third party, against the presentation of stipulated documents in compliance with the terms and conditions of the credit. This mechanism fundamentally shifts payment risk from the buyer to the Issuing Bank, contingent upon documentary compliance, thereby facilitating global trade transactions between unfamiliar parties. The Uniform Customs and Practice for Documentary Credits, currently UCP 600, published by the International Chamber of Commerce (ICC), governs the vast majority of LCs globally, providing a standardized framework for their operation.

Core Participants and Their Functions

The operational architecture of an LC involves several distinct institutional roles:

• Applicant (Buyer/Importer): The party requesting the Issuing Bank to open the LC in favor of the Beneficiary. The Applicant bears the ultimate financial responsibility and provides the necessary instructions for the credit's terms.
• Issuing Bank: The bank that issues the LC on behalf of the Applicant. It undertakes the primary payment obligation, provided that the Beneficiary presents compliant documents. The Issuing Bank typically has an established credit line or collateral arrangement with the Applicant.
• Beneficiary (Seller/Exporter): The party in whose favor the LC is issued. The Beneficiary is entitled to payment upon presenting documents strictly conforming to the LC's terms.
• Advising Bank: A bank, usually in the Beneficiary's country, that authenticates the LC and formally advises its terms to the Beneficiary. The Advising Bank acts as a conduit and does not assume a payment obligation under an unconfirmed LC.
• Confirming Bank (Optional): A bank that, at the request or authorization of the Issuing Bank, adds its own independent undertaking to that of the Issuing Bank. This provides an additional layer of security for the Beneficiary, as they can claim payment from the Confirming Bank irrespective of the Issuing Bank's future solvency or the political/economic risks in the Issuing Bank's jurisdiction. The Confirming Bank typically charges a confirmation fee.
• Nominated Bank: Any bank authorized by the Issuing Bank to pay, incur a deferred payment undertaking, accept a bill of exchange, or negotiate. The Advising Bank frequently acts as the Nominated Bank.

LC Issuance and Advisement Protocols

The initiation of an LC involves a structured sequence of events:

1. Applicant's Request: The Applicant instructs its bank (the prospective Issuing Bank) to open an LC, detailing specific conditions, required documents, and the Beneficiary's details.
2. Issuing Bank's Due Diligence: The Issuing Bank assesses the Applicant's creditworthiness and the proposed terms against its internal policies and UCP 600. Upon approval, it issues the LC.
3. SWIFT MT700 Transmission: The Issuing Bank transmits the LC electronically via the SWIFT (Society for Worldwide Interbank Financial Telecommunication) network. The primary message type for this purpose is the MT700 Issue of a Documentary Credit. This message type contains fields for all essential LC terms, including the Applicant, Beneficiary, amount, currency, expiry date, latest date for shipment, description of goods, required documents, and specific conditions. If the LC text exceeds the MT700's capacity, an MT701 Issue of a Documentary Credit (Continuation) is employed.
4. Advising Bank's Role: The designated Advising Bank receives the SWIFT MT700. It authenticates the message using SWIFT's secure protocols and verifies the apparent genuineness of the credit. Subsequently, the Advising Bank formally advises the credit to the Beneficiary, either directly or through a second advising bank.
5. Confirmation (if applicable): If a confirmation is requested, the Confirming Bank, upon verifying the Issuing Bank's undertaking and assessing its own country and bank risk, adds its confirmation. This is communicated to the Beneficiary, often within the advisement itself.

Documentary Presentation and Examination

The operational heart of the LC lies in the documentary presentation:

1. Goods Shipment and Document Preparation: Following the terms of the underlying sales contract and the LC, the Beneficiary ships the goods and prepares the required commercial and transport documents (e.g., commercial invoice, bill of lading, airway bill, packing list, certificate of origin, insurance document).
2. Presentation to Nominated Bank: The Beneficiary presents these documents to the Nominated Bank (or the Confirming Bank, if applicable) on or before the LC's expiry date and within the stipulated presentation period.
3. Strict Compliance Principle: The Nominated Bank, and subsequently the Issuing Bank, examines the presented documents with reasonable care to determine if they constitute a "complying presentation" as per UCP 600 Article 14. This examination is solely document-based; banks deal in documents, not in goods, services, or other performances to which the documents may relate. The principle of strict compliance dictates that documents must be consistent with each other and with the LC's terms. Minor discrepancies can lead to rejection.
4. SWIFT Messaging for Discrepancies: If discrepancies are found, the Nominated Bank or Issuing Bank will notify the presenting party using a MT750 Advice of Discrepancies. This message details the identified discrepancies and seeks instructions.

Payment, Acceptance, or Negotiation

Upon a complying presentation, the following actions occur:

1. Nominated Bank's Action:
   • At Sight (MT754): If the LC is payable at sight, the Nominated Bank pays the Beneficiary. It then claims reimbursement from the Issuing Bank using a MT742 Reimbursement Claim or sends an MT754 Advice of Payment/Acceptance/Negotiation.
   • Deferred Payment (MT754): If the LC provides for deferred payment, the Nominated Bank incurs a deferred payment undertaking and advises the Beneficiary of the payment due date.
   • Acceptance (MT754): If the LC requires drafts (bills of exchange), the Nominated Bank accepts the drafts, creating an enforceable obligation to pay on the maturity date.
   • Negotiation (MT754): If the LC is available by negotiation, the Nominated Bank purchases the Beneficiary's drafts and/or documents by advancing funds or agreeing to advance funds to the Beneficiary on or before the banking day on which reimbursement is due.
2. Reimbursement by Issuing Bank: The Issuing Bank, having received the documents (often via SWIFT MT754 Advice of Payment/Acceptance/Negotiation from the Nominated Bank or MT742 Reimbursement Claim from the Reimbursing Bank), examines them. If found compliant, it reimburses the Nominated Bank or the Reimbursing Bank as per the LC's reimbursement instructions. The Issuing Bank then debits the Applicant's account. An MT740 Authorization to Reimburse may have been sent by the Issuing Bank to the Reimbursing Bank earlier.

Risk Mitigation and Corporate Credit Enhancement

LCS serve as a critical instrument for mitigating specific risks in international trade:

• Credit Risk: The Beneficiary's exposure to the Applicant's non-payment is replaced by the Issuing Bank's credit risk, or further mitigated by a Confirming Bank's undertaking.
• Country Risk: Confirmation by a bank in the Beneficiary's jurisdiction can insulate the Beneficiary from political or economic instability in the Applicant's country.
• Performance Risk: While an LC is a payment instrument, not a performance guarantee for the underlying contract, the requirement for specific transport documents (e.g., Bill of Lading) provides assurance that goods have been shipped.

Corporate credit guarantees and export credit agency (ECA) support further enhance the LC ecosystem. Institutions like the Export Credit Guarantee Corporation of India (ECGC) or similar bodies globally may provide risk coverage to the Issuing Bank or Confirming Bank, particularly for transactions involving emerging markets or high-risk buyers. This insurance allows banks to issue or confirm LCs for Applicants or countries they might otherwise deem too risky, potentially reducing confirmation fees or enabling larger transaction volumes. For instance, Buyer's Credit facilities often integrate LCs, where a financial institution extends a loan to the importer, with the LC providing the payment assurance for the exporter. This structured approach leverages institutional credit lines and risk mitigation tools to facilitate complex cross-border trade.

SWIFT Messaging Landscape for Documentary Credits

The SWIFT network provides a comprehensive suite of message types specifically designed for the lifecycle of a Documentary Credit:

• MT700 Issue of a Documentary Credit: Initiates the LC.
• MT701 Issue of a Documentary Credit (Continuation): Used when the MT700 message content exceeds field capacity.
• MT705 Pre-advice of a Documentary Credit: An optional, non-operative preliminary advice.
• MT707 Amendment to a Documentary Credit: Modifies existing LC terms.
• MT710 Advice of Third Bank's Documentary Credit: Used by an advising bank to advise a credit issued by a bank other than itself.
• MT720 Transfer of a Documentary Credit: Used for transferring a transferable LC.
• MT730 Acknowledgement of Receipt of a Documentary Credit: Sent by the advising bank to the issuing bank.
• MT732 Advice of Discharge: Used by the accepting/paying/negotiating bank to inform the issuing bank that the documents have been taken up without discrepancies.
• MT734 Advice of Refusal: Sent by the Issuing Bank or Confirming Bank when documents are found discrepant and are refused.
• MT740 Authorization to Reimburse: An authorization from the Issuing Bank to a Reimbursing Bank to honor claims from the Nominated Bank.
• MT742 Reimbursement Claim: Sent by the Nominated Bank (or Reimbursing Bank) to the Issuing Bank (or Reimbursing Bank) to claim funds.
• MT747 Amendment to an Authorization to Reimburse: Modifies an existing MT740.
• MT750 Advice of Discrepancies: Informs the presenter of discrepancies in documents.
• MT752 Authorization to Pay, Accept or Negotiate: Sent by the Issuing Bank to the Nominated Bank to instruct it to pay, accept, or negotiate documents that may have discrepancies.
• MT754 Advice of Payment/Acceptance/Negotiation: Used by the Nominated Bank to inform the Issuing Bank of actions taken on a complying presentation.
• MT756 Advice of Reimbursement or Payment: Used by the Issuing Bank to inform the Nominated Bank that reimbursement has been effected or payment has been made.
• MT760 Guarantee / Standby Letter of Credit: While an LC primarily deals with commercial documents, a Standby Letter of Credit (SBLC), issued via an MT760, functions as a credit support instrument or a performance guarantee, payable upon presentation of a demand and potentially a statement of default, rather than commercial trade documents.