Letter of Credit for B2B Importers: How to Structure an L/C So the Bank Pays and You Don't Lose Your Deposit

The Shipment That Arrived, and the Bank Still Refused

An importer ordered $180,000 of fixtures from a supplier and opened a letter of credit to protect the deal. The goods shipped, arrived on time, and matched the samples. Then the bank refused to pay. The invoice described the goods as "LED panels," while the credit specified "LED panel lights." Two words, one refusal.

This is the part nobody explains to first-time buyers: an L/C protects you on paper, not on the cargo. The bank never saw the goods. It saw a document that didn't match the credit, and under UCP 600 rules that mismatch was enough to walk away. The importer got the goods but lost the protection he paid for.

Documents Beat Goods

Here's the rule to internalize before you open a credit. Banks trade in documents, not products. They pay when the presented paperwork matches the credit exactly, word for word, date for date.

The Core Documents

Document	What it must prove	Common discrepancy
Commercial invoice	Exact goods, amount, and terms	Wording differs from the credit
Bill of lading	Clean, on-board, correct ports	Wrong port or consignee
Packing list	Quantity and weight	Counts don't reconcile
Certificate of origin	Origin for duty and quota	Missing or unsigned
Inspection certificate	Quality and quantity verified	Issued by the wrong party

Draft the document terms yourself in the credit application. Specify exactly which documents the seller must present, who issues each one, and what each must say. The more precise you are at this stage, the fewer surprises at payment.

Irrevocable and Confirmed: The Two Words That Matter

When you open an L/C, two adjectives decide how much protection you actually have.

Irrevocable. The credit can't be changed or cancelled without everyone's consent. This is the default and non-negotiable.
Confirmed. A second bank, usually in the exporter's country, adds its own guarantee to pay. That protects you if the issuing bank or its country runs into trouble. Confirmation costs extra but it's the single best hedge for a first-time deal or a higher-risk country.
At sight. The bank pays when compliant documents are presented, not after a credit period. Start here before you touch deferred payment or revolving credits.

A sight, irrevocable, confirmed L/C is the safest first contract. Every extra feature, revolving, transferable, back-to-back, adds a layer you don't need until you've done a few clean deals.

The Discrepancy Traps That Void Your Protection

Banks reject documents over things that look trivial. Here are the ones that catch importers most often.

Exact wording. The invoice must use the same goods description as the credit. "LED panels" is not "LED panel lights."
Dates. The bill of lading must fall inside the shipping window, and documents must be presented before the credit expires. Late presentation is the most common rejection.
Ports and consignee. Any port or consignee mismatch between the credit and the bill of lading is fatal.
Amounts. The invoice must not exceed the credit amount by even a cent, and it must match the payment terms.
Partial shipments. If the credit doesn't allow partial shipments, the seller must ship everything at once.

The fix is boring but it works: have the seller's bank pre-check every document against the credit before it goes to the issuing bank. A pre-check catches the two-word mismatch for the price of a handling fee instead of a refused payment.

What the L/C Won't Do For You

This is the part sellers and banks don't volunteer. A letter of credit pays against documents, which means it does not verify that the goods exist, that they're good, or that they're what you ordered. A dishonest seller can ship an empty container, present clean documents, and get paid.

That's why the L/C pairs with two other steps. First, a pre-shipment inspection by a third party that verifies quantity, quality, and loading before the goods leave the factory. Second, a contract that defines the goods precisely enough that the documents can't drift. The L/C protects the payment mechanics. The inspection protects the cargo.

Cost, and What It Actually Buys

An L/C isn't free, and the fees surprise first-time buyers. Expect issuing, advising, confirmation, and document-handling charges that together run 0.5 percent to 2 percent of the credit value, plus a margin deposit your bank holds against the credit. On a $100,000 order that's roughly $1,000 to $2,000 in fees, and the margin ties up working capital until the credit expires.

Compare quotes before you open. Fee structures vary more than buyers expect, and a bank that bundles confirmation into the issuing fee can save you a second set of charges. The question to ask isn't "how much is an L/C" but "what does it cost at my order size, and what does the margin do to my cash flow."

Common Questions from Buyers

What is an irrevocable letter of credit and why does it protect me?

An irrevocable L/C is the bank's promise to pay the seller once they present documents that exactly match the credit's terms, regardless of what happens to the goods. The protection works on documents, not the physical shipment. If the goods never arrive or arrive defective, the bank still pays as long as the paperwork is clean, which is why pre-shipment inspection and a correct contract matter as much as the L/C itself.

What is a discrepancy and why do banks reject documents over it?

A discrepancy is any mismatch between the documents and the L/C terms, a misspelled company name, a wrong port, a date outside the allowed window, an invoice that doesn't match the L/C amount. Banks pay against documents alone under UCP 600 rules, so even a trivial mismatch gives them the right to refuse. The standard fix is to present exactly what the credit asks for, word for word, and to have the seller's bank pre-check the documents before they reach the issuing bank.

Which L/C type should a first-time importer use?

An irrevocable, confirmed letter of credit payable at sight is the safest starting point for a first-time importer. Confirmed means a second bank, usually in the exporter's country, adds its own guarantee to pay, which protects you if the issuing bank or its country runs into trouble. Sight payment means the bank pays on presentation of compliant documents, not after a credit period. Deferred payment and revolving credits add complexity you don't need on a first deal.

How much does a letter of credit cost?

Expect to pay a mix of issuing, advising, confirmation, and document-handling fees that typically run 0.5 percent to 2 percent of the L/C value, plus a margin deposit your bank may hold against the credit. On a $100,000 order, budget roughly $1,000 to $2,000 in fees, and remember the margin ties up working capital until the credit expires. Compare bank quotes before opening, because fee structures vary more than most buyers expect.

Verify suppliers before you open a credit on Compare2Best, and structure the payment terms and documents so the bank pays and your deposit stays protected.

This article is produced by the Compare2Best knowledge team and reviewed by trade finance specialists. Updated September 2026. Letters of credit are governed by UCP 600 and vary by bank and jurisdiction; confirm terms with your bank and a qualified trade finance advisor before opening a credit. Nothing here is financial, legal, or banking advice.