Letter of credit (信用证)

Chinese:letter of credit (L/C)Also known as:documentary credit / L/C

A letter of credit is an irrevocable written undertaking issued by a bank at the applicant's request in favour of a beneficiary, under which the issuing bank honours any presentation of documents that complies with the credit's terms. Most credits are subject to the ICC's Uniform Customs and Practice for Documentary Credits (UCP 600).

Key points

  • Main parties: the applicant (usually the buyer), the issuing bank and the beneficiary (usually the seller), plus the advising bank, the nominated bank (negotiating or accepting bank) and the confirming bank.
  • Documents, not goods: banks examine only whether documents appear on their face to comply with the credit, UCP 600 and international standard banking practice (ISBP 745); they do not examine the goods themselves, and the credit is independent of the sales contract.
  • By method of availability, credits are available by sight payment, deferred payment, acceptance or negotiation.

In practice

For exporters, the value of a letter of credit is that it replaces the buyer’s credit with the bank’s – provided the documents comply. In practice, most refusals stem not from problems with the goods but from flaws in the documents: an invoice description that differs from the credit, a bill of lading dated after the latest shipment date, late presentation, or data that conflict between documents. Exporters therefore examine a credit as soon as it arrives, ask promptly for amendments to terms they cannot meet or that contain a soft clause, and check every item against the credit when preparing documents.

For importers, opening a credit uses bank facilities and may require a cash deposit, and the application must match the contract terms. Once documents arrive, the importer must decide within the set time whether to accept any discrepancies, then arrange payment or acceptance to take up the documents.

How Tranexio supports it

Tranexio covers import L/C applications, comparison of issuance advices and amendments, as well as receipt, examination, presentation and settlement of export credits, discrepancy handling and a soft-clause library. Letters of credit are linked to contracts, shipments, receipts and payments. See Letters of credit and collections.

Frequently asked questions

How long does a bank take to examine documents?

Under UCP 600, a nominated bank, the confirming bank (if any) and the issuing bank each have a maximum of five banking days following the day of presentation to examine the documents and determine whether they comply.

What if the credit does not state a period for presentation?

Under UCP 600, a presentation including original transport documents must be made by or on behalf of the beneficiary no later than 21 calendar days after the date of shipment, and in any case not later than the expiry date of the credit.

Do discrepancies always lead to refusal?

Not necessarily. The issuing bank may approach the applicant for a waiver, and if the applicant waives the discrepancies the bank will usually pay. But the beneficiary has by then lost the bank's payment undertaking and the risk is higher. It is best to correct the documents before presentation or have the credit amended in advance.

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Updated 2026-10-06