Types of Letters of Credit Under UCP 600: A Trade Finance Guide

For Indian bankers handling export-import desks, mastering the types of letters of credit is essential to processing trade documents accurately and protecting the bank against payment risk. The Uniform Customs and Practice for Documentary Credits (UCP 600), published by the International Chamber of Commerce, governs how these instruments operate worldwide. This guide breaks down the major types of letters of credit under UCP 600, their practical uses, and the rules that trade finance officers must know for the IIBF International Trade Finance certification.

What a Letter of Credit Is Under UCP 600

A documentary credit, commonly called a letter of credit (LC), is a written undertaking by an issuing bank, given on behalf of an applicant (the buyer), to pay a beneficiary (the seller) a stated sum against presentation of compliant documents. UCP 600 Article 2 defines the credit as "any arrangement, however named or described, that is irrevocable and thereby constitutes a definite undertaking of the issuing bank to honour a complying presentation."

Two principles underpin every LC:

• Autonomy (Article 4) — the credit is a separate transaction from the underlying sale contract; banks deal only with documents.
• Strict compliance (Article 14) — banks examine documents on their face to determine whether they constitute a complying presentation, within a maximum of five banking days.

Because all credits under UCP 600 are irrevocable by default (Article 3), the old "revocable LC" category has effectively disappeared. Understanding this baseline matters before you study the different types of letters of credit, because each variation modifies how, when, or by whom payment is made. If you want a quick warm-up, try the trade finance question bank on our practice tests page.

The Major Types of Letters of Credit

The types of letters of credit are usually classified by the nature of the bank's undertaking and the timing of payment. Knowing each one is a frequent exam area.

By confirmation

• Unconfirmed LC — only the issuing bank is liable; the advising bank merely forwards the credit.
• Confirmed LC — a second bank (usually in the exporter's country) adds its own undertaking under Article 8, giving the beneficiary double protection against country and bank risk.

By payment timing

• Sight LC — payment is made immediately on presentation of complying documents.
• Usance / Deferred LC — payment falls due at a future date, financing the buyer.

By special function

• Revolving LC — reinstates automatically for repeat shipments over a period.
• Transferable LC — under Article 38, allows the first beneficiary to transfer all or part of the credit to second beneficiaries, useful for middlemen.
• Back-to-back LC — a second credit issued on the strength of an existing export LC.
• Red clause LC — permits a pre-shipment advance to the exporter.

You can drill these definitions with our match-the-pairs game to fix the terminology in memory.

Standby Letters of Credit and Transferable Credits

Two of the most exam-relevant types of letters of credit deserve a closer look because of their commercial importance and the way UCP 600 treats them.

Standby letter of credit (SBLC)

A standby LC functions like a guarantee. The beneficiary draws on it only if the applicant defaults on an obligation, presenting a statement and any specified documents. UCP 600 applies to standby credits "to the extent to which they may be applicable," though many SBLCs are issued instead under ISP98 (International Standby Practices). SBLCs are widely used for performance security, bid bonds, and financial assurances where a default-triggered payment is needed rather than payment against trade documents.

Transferable LC

Governed by Article 38, a transferable credit can be transferred only if expressly designated as "transferable" by the issuing bank. Key rules include:

• It can be transferred to one or more second beneficiaries, but a second beneficiary cannot re-transfer (except back to the first beneficiary).
• The amount, unit price, expiry date, and shipment period may be reduced; the percentage of insurance cover may be increased to maintain the original cover.
• The first beneficiary may substitute its own invoice and draft for those of the second beneficiary.

These mechanics make transferable credits indispensable for trading houses and agents who source goods from a supplier and sell to an end buyer. For deeper coverage these topics also overlap with the syllabus in our CAIIB course.

Document Examination and Discrepancies

Whatever the type, the bank's core duty is examining documents. Under Article 14, the issuing bank, confirming bank (if any), and any nominated bank each have a maximum of five banking days following presentation to determine if a presentation is complying. Documents must be examined on their face and must not conflict with one another or with the credit terms.

Common discrepancies that trade finance officers encounter include:

• Late shipment or presentation beyond the 21-day default period (Article 14c) for transport documents.
• Inconsistent description of goods between the invoice and the credit (the invoice description must correspond, per Article 18).
• Bill of lading not marked "shipped on board" or showing an unauthorised transhipment.
• Amounts, quantities, or unit prices exceeding the credit, subject to the "about" tolerance of plus or minus 10 percent (Article 30).

When documents are discrepant, the bank may refuse, but must send a single notice (Article 16) stating each discrepancy and how it is holding the documents, no later than the close of the fifth banking day. Failure to do so means the bank is precluded from claiming the documents do not comply. Staying current with regulatory and rate movements via our RBI rates resource helps when valuing foreign-currency drafts. You can also follow the latest circulars on the IIBF news page.

For authoritative guidance, refer to the official resources of the Reserve Bank of India and the Indian Institute of Banking & Finance.

Frequently Asked Questions

Conclusion and Next Steps

Mastering the types of letters of credit under UCP 600, from sight and usance credits to confirmed, transferable, and standby instruments, is the foundation of every trade finance role and a high-yield area in the IIBF International Trade Finance exam. Pair conceptual study with active recall of UCP 600 articles such as 8, 14, 16, and 38. Ready to test yourself? Attempt a full mock on our practice tests and explore related reading on the iibf.store blog to lock in your trade finance knowledge before exam day.