Types of Letter of Credit: A Practical Guide

The types of letter of credit are best understood as features that answer different questions: who is undertaking to pay, when payment is available, how many shipments are covered, and whether the credit can be used by another party. A serious transaction often combines several features in one credit.

“What type of LC will you accept?” sounds like a simple question. In an international physical fuel transaction, it is usually the beginning of a longer one. The same credit might be irrevocable, confirmed, available at sight, transferable, and structured for a series of shipments. Those labels are not interchangeable, and no label makes an unclear commercial procedure safe on its own.

This guide groups the common types of letter of credit by the decision they change. It is written for parties trying to understand a proposed payment structure before they commit to a procedure, release sensitive documents, or make a commercial introduction. It is general educational information, not legal, banking, compliance, or financial advice. The operative credit, the sales agreement, the incorporated rules, the banks, and qualified advisers govern any specific transaction.

Start with the questions the credit must answer

A documentary letter of credit is a bank undertaking tied to a complying presentation of the documents specified in the credit. It is not a broad promise that the goods will be satisfactory or that every commercial dispute has been resolved. The bank examines the presentation against the credit’s terms. That document-driven structure is why the product description, quantity, shipment window, inspection provisions, transport documents, expiry, and presentation period need to work together before issuance.

Before selecting a type, separate four decisions. First, what event is supposed to lead to payment: a complying shipment presentation, or a default under another agreement? Second, whose payment undertaking does the beneficiary need to rely on? Third, when should payment be available? Finally, does the underlying trade call for one shipment, recurring shipments, an intermediary structure, or controlled pre-shipment funding?

The International Chamber of Commerce’s UCP 600 publication is the widely used rules framework for documentary credits. A proposed credit should state which rules apply, but parties should not assume that a familiar label answers every question. The actual terms, including the required documents and dates, control the practical result.

1. Documentary credit versus standby letter of credit

This is the most important distinction because it changes the purpose of the instrument. A documentary letter of credit is generally intended to be used as the payment method for the sale. The seller ships, presents the stipulated documents, and expects payment or another form of honor if the presentation complies. Van Dyke Energy’s documentary letter of credit process guide walks through the larger sequence from commercial terms through issuance, shipment, examination, and payment.

A standby letter of credit, often called an SBLC, is commonly a backstop. Instead of being the normal route to payment for a shipment, it may be available if the applicant fails to perform the obligation stated in the standby. The draw conditions matter enormously. A standby may call for a statement of default, a demand, supporting documents, or other evidence. It should not be described as a documentary payment credit merely because it contains the words “letter of credit.”

For fuel transactions, this distinction is practical. A seller relying on payment against shipping documents needs to understand whether the proposed instrument is actually available for that purpose. A buyer proposing a standby needs to understand what event permits a draw and whether that structure fits the commercial agreement. The site’s SBLC versus letter of credit guide compares the two approaches in more detail.

2. Irrevocable and revocable credits

An irrevocable credit is one that cannot simply be cancelled or amended by one party acting alone. Under UCP 600, a credit is irrevocable even if it does not say so expressly. That does not mean it can never change. It means changes require the agreement and process contemplated by the credit, rather than an informal email or a unilateral instruction after the other side has begun to rely on the terms.

Revocable credits appear in older explanations and broad lists, but they are not the practical starting point for a serious modern documentary-credit discussion. If the beneficiary could lose the undertaking without the protection expected from the instrument, the commercial value of the payment arrangement changes substantially. The question is not whether someone has called a document “irrevocable” in an offer. The question is whether the issued credit, its rule set, and the amendment mechanics provide the intended certainty.

An irrevocable credit still leaves important work. It does not make an impossible document list possible. It does not ensure that a nominated bank has agreed to honor. It does not override a sanctions concern, a mismatch in delivery basis, or a late presentation. The irrevocable letter of credit guide explains why a line-by-line pre-issuance review remains essential.

3. Confirmed and unconfirmed credits

An unconfirmed documentary credit relies on the undertaking of the issuing bank, subject to the credit and applicable rules. A confirmed credit adds a second bank’s definite undertaking to honor or negotiate a complying presentation. That additional commitment can matter when the beneficiary is assessing issuing-bank risk, jurisdictional risk, transfer or currency restrictions, or the practical comfort of relying on one bank alone.

Confirmation is not created by a request in a soft offer, an indicative procedure, or the name of a respected bank. The issuing bank must authorize or request confirmation and the bank asked to confirm decides whether to add its undertaking. The U.S. International Trade Administration’s trade-finance guide notes that exporters may consider confirmation when they are concerned about a foreign bank or a higher-risk market. It is a risk decision, not a decorative phrase.

Neither structure removes the need for a complying presentation. A confirmed credit can still be refused if the documents are late, missing, inconsistent, or issued by the wrong party. An unconfirmed credit may be perfectly workable where the parties, issuing bank, country, terms, and transaction profile support it. Van Dyke Energy’s confirmed letter of credit guide explains the respective roles of issuing, advising, nominated, and confirming banks.

4. Sight, deferred-payment, and acceptance structures

These types address timing. A sight credit is commonly available for payment after the bank receives and examines a complying presentation. “Sight” does not mean a seller is paid the second a document reaches a desk. Banks still have an examination process, and the credit determines where and how the presentation is made. The key commercial point is that payment is intended to follow compliant documents rather than a later maturity date.

A deferred-payment credit sets a future payment date or a calculable time after a stated event. It may fit a transaction where the buyer and seller have agreed that payment should follow shipment by a defined period. That timing can affect price, cash flow, bank risk, insurance, and the seller’s willingness to proceed. A party should ask exactly what date starts the clock, what documents establish that event, and what happens if dates in the presentation conflict.

An acceptance credit involves a time draft or bill of exchange accepted under the credit’s terms. It is often grouped with deferred-payment structures because both involve payment later than the initial presentation, but the documents and bank mechanics can differ. Neither is automatically better. The right choice depends on the sales agreement, the shipment plan, the parties’ working-capital needs, and the banks’ willingness to support the structure.

For any timing-based structure, work backward from expiry. Confirm the latest shipment date, transport-document date, inspection timing, presentation period, place of presentation, and the time needed to cure an avoidable discrepancy. The site’s guide to documents required for a letter of credit can help parties see why a generic checklist often fails to match the real operation.

5. Transferable and back-to-back credits

These structures respond to an intermediary or supply-chain question. A transferable credit permits the first beneficiary, subject to the credit’s express terms, to request that it be made available in whole or in part to one or more second beneficiaries. It is not transferable merely because the parties expect an intermediary to be involved. The credit must state that it is transferable, and the relevant bank handles the transfer according to the stated terms and rules.

A back-to-back arrangement is different. It generally involves one credit serving as the basis for a separate credit issued in favor of an underlying supplier. There are two instruments, two sets of terms, and additional complexity. A mismatch between them can expose the intermediary to timing, document, quantity, price, or discrepancy risk. It is not a shortcut for avoiding clear roles and authority.

In physical fuel trade, parties should be cautious about treating either term as proof that a supply chain is genuine or that the intermediary has authority. The commercial chain, product access, delivery basis, documents, and bank structure must be reviewed individually. A well-known instrument name does not answer whether the underlying product or procedure is credible.

6. Revolving, red-clause, and other specialized features

A revolving credit is designed to become available again after use, usually by value, time, or both. It can be relevant to a recurring supply program, but it must define how the amount reinstates, whether unused availability carries forward, the overall cap, and the final expiry. A recurring demand forecast alone is not enough. The parties need a realistic delivery program and a credit that matches it.

Red-clause and green-clause credits are specialized structures associated with pre-shipment advances. They should be approached carefully because they change the risk allocation before the ordinary documentary presentation. The exact conditions for any advance, security, warehouse or storage evidence, and repayment consequences must be clear. These are not casual additions to a standard procedure, and not every bank will support them.

Other labels can appear in discussions, including assignment of proceeds, installment credits, and credits available by negotiation. Each calls for the same discipline: identify the commercial problem the feature is supposed to solve, read the exact wording, identify the bank’s actual role, and test whether the operational team can meet the requirements. A long list of labels is not a transaction plan.

How the features combine in one credit

Many misunderstandings come from treating these categories as a menu of mutually exclusive choices. They are not. A credit can be irrevocable and confirmed at the same time. It can be a documentary credit that is available by deferred payment. It can be transferable, subject to UCP 600, and available for several scheduled shipments. Each label describes one part of the structure, not the entire commercial relationship.

Consider a seller that needs payment against a compliant presentation, wants the assurance of a second bank, and can accept payment thirty days after the transport document date. The discussion is not simply about a “confirmed LC.” The parties also need to settle documentary versus standby purpose, confirmation, the deferred-payment date, the named banks, the shipment and presentation periods, the document list, and the process for amendments. Missing one of those decisions can undermine the rest.

Likewise, a buyer may hear that a credit is irrevocable and assume the delivery plan is locked down. Irrevocability addresses amendment and cancellation mechanics. It does not identify the appropriate product specification, prove the seller’s authority, decide who issues an inspection certificate, or solve a mismatch between the agreed delivery basis and the documents the credit calls for. Each element should be read in the context of the whole transaction.

Pre-issuance checklist for any LC type

Before a buyer asks a bank to issue a credit, and before a seller treats a draft as acceptable, the parties should be able to answer a short set of operational questions in plain language. If an answer is uncertain, that is usually a reason to resolve it before issuance rather than hoping it can be fixed after a vessel, terminal, inspector, or bank is already working to a deadline.

Identify the exact commercial obligation

State the product, specification, quantity, tolerances, price basis, delivery basis, loading or delivery location, and shipment period. A credit should not force a document to prove a product characteristic, volume, or delivery event that the agreed operation cannot establish. Vague references to “standard procedure” should be replaced with the actual sequence and responsible party.

Name every party and bank role

Confirm the applicant, beneficiary, issuing bank, advising bank, nominated bank, confirming bank where relevant, inspector, carrier, insurer, and any intermediary. A title in an email is not the same as a role accepted in the operative credit. If confirmation or transfer is expected, establish which bank has authority to perform it and whether it has agreed.

Match every document to the physical operation

List each required document, the party expected to issue it, the information it must contain, and the earliest and latest realistic date it can be obtained. A party should test the document package against the sales agreement, transport plan, inspection arrangement, and local practice. The point is not to make the list longer. It is to make sure every item has a real purpose and can be presented as required.

Work backward from expiry and presentation

Start with the expiry date and latest presentation date, then work backward through shipping, document issuance, inspection, courier or electronic delivery, internal review, and bank examination. A credit can look commercially sound until the team realizes that a required certificate is only issued after the credit’s presentation window closes. Build enough time for a discrepancy to be recognized and addressed through the proper amendment process if needed.

Clarify amendments before they are needed

Changes in volume, shipment dates, port, product description, or document wording can have consequences across the sales agreement, logistics plan, and bank undertaking. Agree who may request an amendment, which parties must accept it, and what work pauses until it is effective. No party should load cargo or prepare a presentation on the assumption that an informal commercial message has changed the credit.

Confirm compliance and authority early

A bank instrument does not replace counterparty review, sanctions screening, product-origin checks, or authority to transact. The commercial parties should understand the relevant chain before sensitive documents are exchanged or a formal bank process begins. That protects both sides from spending time on a structure that cannot responsibly move forward.

A practical selection framework for fuel transactions

Start with the payment event. If the seller expects payment against shipping and commercial documents, a documentary-credit structure may be the relevant starting point. If the parties need a performance backstop, a standby may be the more accurate concept. Do not use one label when the intended function is the other.

Then test bank risk and country risk. Is the beneficiary comfortable with the issuing bank alone, or does the transaction warrant discussion of confirmation? Is the proposed confirming bank actually prepared to act? The seller should make this clear before product preparation, vessel scheduling, or other costly commitments depend on a payment structure that has not been accepted.

Next, match payment timing to the physical operation. A sight structure may be appropriate where cash is expected against compliant documents. A deferred or acceptance structure requires a clear maturity framework. In each case, product inspection, bills of lading or other transport documents, insurance, certificates, and presentation deadlines must work with the delivery basis and agreed timeline.

Finally, keep the transaction proportionate. A one-off trial lift and a long-term recurring supply program do not necessarily need the same structure. A buyer with a defined requirement can review Van Dyke Energy’s buyer readiness guidance and submit a structured fuel request. A supply-side party can use the supplier submission to present its role, product, and supporting information. Both paths help surface the details that must be settled before a bank instrument becomes useful.

Where Van Dyke Energy fits

Van Dyke Energy is a broker and intermediary, not an issuing bank, confirming bank, seller, or legal adviser. Its role is to help qualified buyers and credible supply-side parties establish whether the product requirement, volume, delivery basis, timing, counterparty roles, documentation, and commercial procedure are sufficiently clear for a serious conversation.

That early review does not decide which bank should issue or confirm a credit. It helps ensure that a proposed instrument is tied to a defined physical opportunity rather than a generic procedure copied from an unrelated transaction.

That is why the right question is rarely just “Which type of LC?” A better first question is whether the commercial and operational facts are defined well enough for the appropriate banks and advisers to evaluate the structure. Parties can also review Van Dyke Energy’s compliance approach and the broader Trade Finance insights collection before moving to a transaction-specific discussion.

This article is general educational information, not legal, banking, compliance, or financial advice. Documentary credits and international trade procedures should be reviewed with qualified advisers for the specific transaction.