Documentary Letter of Credit (DLC) Guide | UCP 600

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How a Documentary Letter of Credit Works

Container ship at an international container port illustrating documentary letter of credit trade finance

A documentary letter of credit (DLC), also called a documentary credit or commercial letter of credit, is an irrevocable bank undertaking to honour a complying presentation of documents. It is widely used in international trade when buyers and sellers need a bank undertaking to bridge the gap between shipment and payment.

The buyer, known as the applicant, asks an issuing bank to open the letter of credit in favour of the seller, known as the beneficiary. The credit specifies the amount, expiry date, shipment conditions, payment tenor and documents the beneficiary must present.

If the beneficiary makes a complying presentation, the issuing bank honours the credit according to its terms. The bank deals with the documents required by the credit rather than inspecting the physical goods themselves. This documentary principle is central to how letters of credit allocate payment risk.

Documentary Letter of Credit at a Glance

A DLC substitutes an independent bank undertaking for direct reliance on the buyer's promise to pay. The seller must satisfy the documentary conditions of the credit, while the buyer obtains a payment mechanism tied to agreed shipping and commercial documentation.

Primary payment instrument A commercial DLC is normally intended to be drawn when the underlying trade is performed.
Document based Banks determine compliance from the stipulated presentation, not from inspection of the cargo itself.
Bank undertaking The issuing bank undertakes to honour a complying presentation according to the terms of the credit.
Flexible structure The credit may be sight, usance, confirmed, transferable or structured around other trade requirements.

What a Documentary Letter of Credit Actually Does

International trade creates a timing problem. A seller may be unwilling to ship valuable goods before receiving payment, while a buyer may be unwilling to transfer the full purchase price before evidence of shipment exists.

A documentary letter of credit introduces an issuing bank into that payment relationship. Instead of relying solely on the buyer's creditworthiness and willingness to pay after shipment, the beneficiary receives the benefit of the issuing bank's undertaking, provided the presentation complies with the credit.

From the buyer's perspective, the payment mechanism can be tied to specified documents such as a commercial invoice, bill of lading, certificate of origin, inspection certificate and insurance documents.

A DLC can therefore support both payment risk management and the wider financing structure of a transaction. For transactions requiring a broader debt or working-capital solution, see Financely's trade finance transaction structuring capabilities.

Important: a documentary letter of credit does not certify that the underlying goods are genuine, correctly valued or commercially satisfactory. Banks deal with documents. Buyers must still conduct appropriate counterparty, inspection, logistics and fraud controls.

Parties to a Documentary Letter of Credit

Party Role Commercial Significance
Applicant The buyer or other party that requests issuance of the credit. The applicant must satisfy the issuing bank's credit, collateral and reimbursement requirements.
Issuing Bank The bank that issues the documentary credit in favour of the beneficiary. Its undertaking is central to the beneficiary's payment risk analysis.
Beneficiary The seller or other party in whose favour the credit is issued. The beneficiary must make a complying presentation within the applicable deadlines.
Advising Bank The bank that advises the credit to the beneficiary after satisfying itself as to its apparent authenticity. Advising the credit does not by itself create a separate payment undertaking.
Confirming Bank A bank that adds its own undertaking to that of the issuing bank. Confirmation can materially reduce exposure to the issuing bank and its jurisdiction.
Nominated Bank The bank with which the credit is available or the bank authorised to act under the credit. Its role depends on whether the credit is available by payment, deferred payment, acceptance or negotiation.

Documentary Letter of Credit Process Step by Step

  1. Buyer and seller agree the commercial contract.
    The purchase contract identifies the goods, price, Incoterms, shipment dates and documentary letter of credit as the payment method.
  2. The buyer applies to its bank.
    The applicant requests issuance of the credit. The issuing bank reviews the applicant's facility availability, collateral position, transaction purpose, sanctions exposure and credit profile.
  3. The issuing bank prepares the credit.
    The credit sets the beneficiary, amount, currency, expiry, latest shipment date, required documents, payment tenor and other operative conditions.
  4. The DLC is transmitted.
    Documentary credits are commonly issued through SWIFT using an MT700. Financely's MT700 guide covers the principal fields and their role in documentary credit issuance.
  5. The advising bank advises the credit.
    The beneficiary receives the operative instrument and should review the wording before shipment.
  6. Amendments are requested where necessary.
    Conditions that conflict with the sale contract or cannot realistically be evidenced should be addressed before the goods move.
  7. The seller ships the goods.
    Shipment must occur within the period permitted by the credit.
  8. The beneficiary prepares and presents the documents.
    The presentation must contain the documents stipulated by the credit and satisfy the relevant presentation deadlines.
  9. The bank examines the presentation.
    The presentation is examined against the terms of the credit, UCP 600 where incorporated, and applicable international standard banking practice.
  10. The credit is honoured according to its terms.
    A sight credit and a deferred-payment or acceptance credit have different payment mechanics, but both depend on a complying presentation.

UCP 600 and Documentary Letters of Credit

Most international commercial letters of credit are issued subject to the International Chamber of Commerce's Uniform Customs and Practice for Documentary Credits, commonly known as UCP 600.

UCP 600 establishes the framework governing matters such as the independence of the credit, bank examination of documents, complying presentations, transport documents, insurance documents, expiry, presentation periods and refusal notices.

Financely has a dedicated UCP 600 guide covering the rules in greater depth.

Irrevocable Undertaking

Under UCP 600, a credit is irrevocable even if there is no indication to that effect. The applicant cannot simply cancel an issued documentary credit without the required agreement.

Documents, Not Goods

Banks deal with documents and not with goods, services or performance to which the documents may relate.

Five Banking Days

A nominated bank acting on its nomination, a confirming bank and the issuing bank each have a maximum of five banking days following the day of presentation to determine whether a presentation complies.

Data Must Not Conflict

Information across the presentation does not generally need to be literally identical, but data must not conflict with the credit, the document itself or another stipulated document.

For practical examples of what banks may reject, see our analysis of common letter of credit discrepancies under UCP 600.

Types of Documentary Letter of Credit

A documentary credit can combine several characteristics. A credit may, for example, be confirmed and available by deferred payment at the same time. The structure should follow the payment cycle, risk allocation and financing requirements of the transaction.

LC Structure How It Works Typical Application
Sight LC Available for payment at sight following a complying presentation. Transactions where the seller requires prompt payment after shipment and presentation.
Usance / Deferred Payment LC Payment falls due at a future maturity specified by the credit. Transactions where the buyer requires a working-capital period before final payment.
Confirmed LC A second bank adds its own undertaking to the issuing bank's undertaking. Transactions where the beneficiary wants additional issuing-bank or country-risk protection.
Transferable LC The credit expressly permits the first beneficiary to request transfer to a second beneficiary in accordance with the applicable terms. Intermediary trades where a trader needs to make credit available to an underlying supplier.
Back-to-Back LC A separate second documentary credit is issued in favour of the underlying supplier. Trading structures where a separate supplier-side instrument is required.
Revolving LC The available amount can be restored according to the revolving provisions of the credit. Recurring shipments under an established supply relationship.

Sight Letter of Credit vs Usance Letter of Credit

Payment timing is one of the most important commercial decisions in a documentary credit.

Sight Letter of Credit

A sight credit is structured for payment at sight following a complying presentation. It is commonly used when the seller does not want to extend meaningful payment terms after shipment.

Usance Letter of Credit

A usance or deferred-payment structure creates a future maturity, such as a specified number of days after shipment, bill of lading date, sight or another defined event.

For a direct comparison, see sight letter of credit vs usance letter of credit.

Buyers evaluating deferred terms can also review our usance letter of credit guide and our analysis of the difference between usance and acceptance letters of credit.

Confirmed Documentary Letters of Credit

A beneficiary may be comfortable with the commercial buyer but unwilling to take the full credit or country exposure of the issuing bank. Confirmation can address that problem.

When an eligible bank adds confirmation, that confirming bank assumes its own undertaking to honour or negotiate a complying presentation according to the credit. The beneficiary therefore has an additional bank undertaking rather than relying solely on the original issuing institution.

Confirmation pricing depends on factors including the issuing bank, country, tenor, transaction amount, availability structure and market appetite.

See our detailed comparison of confirmed and unconfirmed letters of credit.

Documentary Letter of Credit vs Standby Letter of Credit

Documentary letters of credit and standby letters of credit are both bank undertakings, but their commercial functions are different.

Feature Documentary Letter of Credit Standby Letter of Credit
Commercial role Primary payment mechanism. Contingent credit-support instrument.
Expected drawing The beneficiary normally expects to present documents and draw under the credit. A drawing generally occurs when the supported obligation is not performed.
Typical documents Commercial and shipping documents tied to the trade. Often a demand, statement of default or documents defined by the standby.
Common rules Frequently UCP 600. Frequently ISP98, although other rules may apply.

Businesses requiring a contingent guarantee rather than a primary trade-payment mechanism should review our standby letter of credit guide.

Documents Required Under a Documentary Letter of Credit

There is no universal documentary package for every letter of credit. The required presentation is determined by the credit itself and should be designed around the actual commercial and logistics flow.

Document What Typically Matters
Commercial Invoice Applicant details, currency, amount, description of goods and compliance with invoice-specific conditions in the credit.
Bill of Lading Shipment date, ports, carrier execution, on-board notation, consignee, notify party and transport terms.
Packing List Quantity, weight, packaging and consistency with the wider documentary presentation.
Certificate of Origin Country of origin, issuing authority and any wording stipulated by the credit.
Insurance Document Coverage amount, risks, currency, date and issuer where insurance documentation is required.
Inspection Certificate Independent evidence of quantity, specification, quality or condition where stipulated.
Weight or Quality Certificate Frequently used in agricultural, metals, energy and other physical commodity trades.

Do not overload the LC with unnecessary conditions. Every additional document, certificate, signature, date or third-party condition creates another potential point of discrepancy. The credit should protect the commercial transaction without making ordinary performance unnecessarily difficult.

Common Documentary Letter of Credit Discrepancies

Documentary discrepancies can delay payment, create amendment costs and leave the beneficiary dependent on a waiver from the applicant or issuing bank.

Late Shipment

The transport document evidences shipment after the latest shipment date permitted by the credit.

Late Presentation

Documents are presented outside the permitted presentation period or after the credit has expired.

Conflicting Information

Quantities, dates, ports, names, weights or other material data conflict between stipulated documents.

Transport Document Defects

The bill of lading or other transport document fails to satisfy the applicable credit requirements.

Missing Documents

The beneficiary fails to provide one of the documents expressly required by the credit.

Unfulfilled Documentary Condition

A required condition is not evidenced in the manner stipulated by the letter of credit.

Practical rule: review the proposed LC wording before issuance, then review the operative instrument again before shipment. A substantial proportion of avoidable documentary problems originate in poor drafting rather than in the physical trade itself.

For a more detailed discrepancy checklist, see common LC discrepancies under UCP 600.

Documentary Letter of Credit Fees and Costs

Documentary letter of credit pricing is transaction-specific. Banks price the facility according to the applicant's credit profile, collateral or facility position, amount, tenor, jurisdiction, issuing-bank risk, confirmation requirements and operational complexity.

Fee What It Covers
Issuance Fee The issuing bank's charge for opening the documentary credit.
Advising Fee The advising bank's charge for authenticating and advising the credit.
Confirmation Fee Compensation for the confirming bank assuming additional payment exposure.
Amendment Fee Charged when terms of the issued credit are changed.
Document Examination Fee Operational charges associated with examining the presentation.
Discrepancy Fee May be charged when a presentation is found discrepant.
Discounting Cost Relevant where an eligible usance or deferred-payment obligation is financed before maturity.

For a detailed cost breakdown, see Financely's letter of credit fees guide.

Documentary Letters of Credit for Commodity Traders

Documentary credits are widely used in physical commodity trading because substantial value can move between counterparties that operate in different jurisdictions and may have limited trading history with one another.

A commodity LC may need to accommodate bills of lading, certificates of quantity and quality, certificates of origin, inspection reports, insurance documentation, independent surveyors and detailed shipment tolerances.

Traders also face a separate problem: the incoming buyer-side letter of credit may not automatically finance the purchase from the upstream supplier.

That can create a need for a transferable credit, back-to-back facility, borrowing-base structure, pre-shipment financing, discounting or another working-capital solution. Our commodity trade finance page covers these structures in greater detail.

Transferable vs Back-to-Back Letters of Credit

Intermediary traders frequently need to convert buyer-side payment security into a structure their supplier can rely on.

A transferable letter of credit allows the first beneficiary to request transfer to a second beneficiary where the credit expressly states that it is transferable.

A back-to-back structure instead involves a second and separate documentary credit issued in favour of the underlying supplier.

The two approaches create different credit, operational and document-matching requirements. See our transferable vs back-to-back letter of credit comparison.

Financely also provides dedicated back-to-back letter of credit structuring for qualifying transactions.

When a Documentary Letter of Credit Makes Sense

A DLC May Be Appropriate When

  • The buyer and seller have limited trading history.
  • The seller does not want unsecured buyer exposure.
  • The transaction value is material.
  • The seller requires an acceptable bank undertaking.
  • The transaction involves elevated jurisdictional risk.
  • The LC will support discounting or another financing facility.
  • Documentary control is important to the transaction structure.

Another Payment Method May Be Better When

  • The parties have a mature open-account relationship.
  • The bank charges materially impair the economics of the trade.
  • The required documentation cannot realistically follow the logistics flow.
  • Credit insurance already addresses the relevant payment exposure.
  • The commercial requirement is actually contingent security rather than primary payment.

Documentary Letter of Credit Advisory

More complex documentary credit transactions often require work before a bank is approached. The commercial contract, payment tenor, issuing-bank requirement, collateral position, document flow and underlying financing structure need to fit together.

Financely provides paid letter of credit advisory and trade finance structuring for qualifying corporate and commercial transactions.

A mandate may include transaction review, LC structuring, proposed wording analysis, bank and lender mapping, confirmation analysis, collateral-gap assessment, document-flow review and distribution to relevant financial institutions.

Financely is an advisory firm and does not represent itself as the issuing bank. Bank approval, pricing, collateral requirements and issuance remain subject to the relevant institution's underwriting and compliance procedures.

Businesses requiring professional support can review our letter of credit advisory services.

Request a Paid Letter of Credit Advisory Quote

Have a live import, export or commodity transaction requiring a documentary letter of credit? Submit the transaction parameters for a paid advisory quote covering the required scope, deliverables and next steps.

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Documentary Letter of Credit FAQ

What is a documentary letter of credit?

A documentary letter of credit is an irrevocable bank undertaking to honour a complying presentation under the terms of the credit. It is commonly used as a primary payment mechanism in international trade.

Is a documentary letter of credit the same as an LC?

The terms documentary letter of credit, documentary credit, commercial letter of credit and LC are frequently used in overlapping commercial contexts. The operative terms of the actual instrument determine how it functions.

What SWIFT message is used to issue a documentary letter of credit?

An MT700 is the principal SWIFT Category 7 message used to issue a documentary credit. Other Category 7 messages are used for amendments and related documentary-credit communications.

Does a letter of credit guarantee payment?

A documentary credit creates a bank undertaking to honour a complying presentation according to its terms. It should not be treated as an unconditional promise to pay regardless of documentary compliance.

How long does a bank have to examine LC documents?

Under UCP 600, a nominated bank acting on its nomination, a confirming bank and the issuing bank each have a maximum of five banking days following the day of presentation to determine whether the presentation complies.

What is the difference between a sight LC and a usance LC?

A sight LC is available for payment at sight according to its terms. A usance, acceptance or deferred-payment credit establishes a future payment maturity.

What is a confirmed documentary letter of credit?

A confirmed letter of credit carries an additional undertaking from the confirming bank in addition to the issuing bank's undertaking. Confirmation is often used to mitigate issuing-bank or country exposure.

Can a documentary letter of credit be used for commodity trading?

Yes. Documentary letters of credit are widely used in agricultural commodities, metals, energy products and other physical goods trades because payment can be tied to a defined documentary presentation.

Can a usance letter of credit be discounted?

Depending on the issuing bank, structure, tenor and financial institution involved, an eligible deferred-payment or acceptance obligation may be discounted before maturity.

Who pays the letter of credit fees?

Fee allocation depends on the underlying sale contract and the wording of the credit. Issuance, advising, confirmation, amendment and other charges may be allocated differently between applicant and beneficiary.

Can an intermediary trader use a buyer's LC to pay its supplier?

Potentially. Structures may include a transferable letter of credit, back-to-back letter of credit or another trade finance facility. The appropriate structure depends on the wording of the incoming credit, the trader's bank relationship, supplier requirements and transaction economics.

Disclaimer: This material is for general informational purposes and does not constitute legal, banking, investment or financial advice. Documentary credit requirements vary by transaction, bank, jurisdiction, governing law and instrument wording. UCP 600 applies where incorporated into the credit. Live transactions should be reviewed by appropriately qualified banking, legal and trade finance professionals.

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