A Nigerian exporter ships a full container of cashew nuts to a buyer in Vietnam, an ocean and several weeks away, on nothing more than the buyer's word that payment will follow. Or a Lagos importer wires a full deposit to a supplier in Guangzhou they have never met and hopes the goods actually arrive as described. Both scenarios happen every day in Nigerian trade, and both carry real risk that a letter of credit exists specifically to reduce. Here is what a letter of credit actually is, how it works, and when it genuinely makes sense to use one.
What a Letter of Credit Actually Is
A letter of credit, often abbreviated LC, is a formal guarantee issued by a bank on behalf of a buyer, promising to pay the seller a specified amount, provided the seller meets a precisely defined set of conditions, almost always the presentation of specific shipping and export documents proving the goods were shipped as agreed. In plain terms, it replaces trust in a stranger you have never met with trust in a bank, an institution with far more accountability and far less incentive to disappear with your money.
This matters enormously in cross border trade, where a Nigerian seller and a foreign buyer, or a Nigerian buyer and a foreign supplier, often have no prior relationship, operate under different legal systems, and have limited practical recourse if the other side simply does not honor the deal.
How a Letter of Credit Actually Works
The process generally follows a defined sequence. The buyer and seller agree on terms, including that payment will be made via letter of credit, as part of their sales contract. The buyer then instructs their bank, known as the issuing bank, to open a letter of credit in the seller's favor, specifying the amount, the documents required, and the deadline for shipment and document presentation.
The issuing bank sends the letter of credit to a bank in the seller's country, known as the advising bank, which confirms its authenticity to the seller. The seller, now confident that a bank stands behind payment, ships the goods and gathers the required documents, typically a commercial invoice, packing list, bill of lading, Certificate of Origin, and any product specific certificates.
The seller presents these documents to their bank, which checks them against the letter of credit's exact requirements and forwards them to the issuing bank. If everything matches precisely, the issuing bank releases payment, either immediately for a sight letter of credit or at an agreed future date for a usance letter of credit, and the buyer receives the documents needed to claim the goods at the destination port.
Why Precision in Documentation Matters So Much
The entire mechanism depends on strict compliance between the documents presented and the letter of credit's exact terms. Banks operate on what is often called the doctrine of strict compliance, meaning even a small discrepancy, a misspelled company name, a shipment date one day later than the letter of credit allowed, or a quantity that does not precisely match, can give the issuing bank grounds to refuse payment.
This is exactly why the documentation discipline covered elsewhere, getting your NXP form, commercial invoice, packing list, and Certificate of Origin exactly right and fully consistent with each other, is not just good practice for customs clearance, it is often the difference between getting paid under a letter of credit and having payment delayed or rejected over a technicality.
The Different Types of Letters of Credit
A sight letter of credit pays the seller as soon as compliant documents are presented and verified, making it the fastest and generally most favorable structure for a seller. A usance, or deferred payment, letter of credit specifies payment at a later date after document presentation, commonly thirty, sixty, or ninety days, which favors the buyer by giving them time before payment is due, often because they plan to sell the goods first.
A confirmed letter of credit adds a second guarantee from a bank in the seller's own country, on top of the issuing bank's guarantee, which matters when a Nigerian exporter is uncertain about the financial stability or reputation of a foreign buyer's issuing bank, particularly one in a market they have not dealt with before. This added security comes at an additional confirmation fee, but for a first transaction with a buyer in an unfamiliar market, it is often worth the cost.
When a Letter of Credit Makes Sense
A letter of credit is most valuable for larger transactions where the cost, banks charge fees for issuing, confirming, and processing an LC, is proportionally small compared to the deal size, for a first transaction with a new trading partner where trust has not yet been established, and for trade with a buyer or seller in a market where legal recourse would be difficult or impractical if something went wrong.
It is less necessary once a trading relationship has matured and both sides have demonstrated reliability over several completed transactions, at which point simpler and cheaper payment structures, like partial advance payment against open account terms, become reasonable. It is also less practical for very small transactions, where LC fees can eat disproportionately into the deal's value.
What It Costs
Letter of credit fees vary by bank and transaction size but generally include an issuance fee paid by the buyer, an advising fee, and if applicable, a confirmation fee, often paid by the seller if they specifically require confirmation for their own comfort. For a Nigerian exporter or importer, factor these fees into your overall pricing and margin calculation rather than treating them as a rounding error, since on a smaller transaction they can represent a meaningful percentage of the deal.
Common Mistakes to Avoid
Do not agree to letter of credit terms without reading the full document carefully, since the specific conditions listed determine exactly what you must present to get paid, and missing a requirement discovered only after shipment can be costly to fix. Do not assume a letter of credit eliminates all risk, since document discrepancies, delays, or a genuinely unreliable issuing bank in an unstable market can still create problems. Do not skip working with your bank's trade finance desk early in the process, since they can review a draft letter of credit's terms before you ship and flag conditions that would be difficult for you to meet.
The Bottom Line
A letter of credit exists to solve a specific problem: trust between parties who have no other reason to trust each other across a long distance and legal divide. For larger transactions and new trading relationships, it remains one of the most reliable tools a Nigerian business has for protecting itself in international trade, provided the documentation is handled with the precision the mechanism actually demands.
