What Is a Letter of Credit for Importing From Thailand?

What a letter of credit is and why buyers use it

A letter of credit is a written undertaking issued by a bank, at the buyer's request, to pay the seller a stated amount when the seller presents documents that comply exactly with the terms of the credit. In plain terms, the bank pays against paperwork, not against promises. Your supplier in Thailand gets comfort that a bank stands behind the payment, and you get comfort that money is released only when the seller shows the shipping documents you agreed on.

The parties are easy to name. You are the applicant. Your bank is the issuing bank. The Thai supplier is the beneficiary. The beneficiary's bank, often called the advising or confirming bank, passes on the credit and may add its own commitment if the credit is confirmed.

Buyers use L/Cs because they reduce one specific risk: paying for goods that never ship. They are especially common when the relationship is new, the order is large or the countries involved have different legal systems. They do not, however, guarantee product quality. A bank checks documents, not the physical goods, so a perfect set of papers can still describe a disappointing shipment.

That last point is important and often misunderstood. An L/C moves payment risk, not quality risk. To manage quality you still need clear specifications, samples, and where appropriate, a pre-shipment inspection. Think of the L/C as one layer of protection rather than the whole solution, and decide whether the added structure is worth it for the size and nature of your order.

How an L/C works step by step

The process follows a fairly standard sequence, although details depend on your bank and the terms you negotiate. Treat the steps below as a general overview and confirm the specifics with your bank.

• **Agree the commercial terms.** You and the Thai supplier agree on the product, specification, price basis, shipping terms, port and payment by L/C. The sales contract should say which type of L/C is expected.
• **Apply to your bank.** You complete an application and your bank assesses your credit. Banks may ask for collateral or set aside part of your credit line.
• **The bank issues the credit.** It sends the L/C to the supplier's bank, which advises the supplier. The supplier checks the terms carefully and asks for amendments if anything does not match the deal.
• **The supplier ships and prepares documents.** Typically this includes a commercial invoice, packing list, transport document such as a bill of lading, and any certificates required by the credit.
• **Documents are presented to the bank.** The bank checks them against the credit. If they comply, payment is made or promised according to the L/C terms. If they do not comply, the documents are discrepant and payment can be refused or delayed.
• **You receive the documents and clear the cargo.** The transport document usually lets you collect the goods.

Because tiny differences count, such as a misspelled name or a mismatched description, both sides should review the draft L/C before it is finalised.

Common types and terms to understand

Not all letters of credit are the same, and choosing the wrong type can create confusion. The most common for trade is the irrevocable L/C, which cannot be changed or cancelled without the agreement of all parties. Beyond that, you will meet several variations.

A confirmed L/C has a second bank, usually in the seller's country, adding its own payment commitment. A sight L/C pays when compliant documents are presented, while a usance or deferred L/C allows payment at a later date after presentation. A standby L/C works more like a guarantee that is only called if the buyer fails to pay. Some credits allow partial shipments or transshipment, and others forbid them, so match these clauses to your actual shipping plan.

Pay attention to the details that most often cause problems: the latest shipment date, the document presentation period, the exact goods description, the shipping terms and the required certificates. For example, if you import Thai herbal products, the credit may need specific wording on product names and any certificates your market expects. If the description in the L/C does not match the invoice word for word, the bank may treat the document set as discrepant.

Most trade L/Cs follow international banking rules published by the International Chamber of Commerce, which provide a common reference for how banks examine documents. Ask your bank to explain which rules the credit will follow and what they mean for you in practice.

Costs, effort and risks you should weigh

An L/C is useful, but it is not free or effortless. Banks charge fees for issuing, advising, amending and handling documents, and they may charge for confirmation or for deferred payment. Fee levels vary between banks and countries, so ask your bank for a full written schedule before you apply, rather than guessing.

There is also a cost in time and attention. Someone has to prepare accurate documents, check the credit terms and respond quickly to amendments. Small businesses sometimes find that the administrative load is heavy for a modest order, particularly when they ship mixed product lines, because every item must be described consistently across all documents.

The main risks are discrepancies and timing. If the supplier's documents contain errors, payment may be delayed until they are corrected, and this can disrupt your clearance schedule. Make sure your shipping and clearance plans leave room for that possibility.

Finally, remember what an L/C does not cover. It does not check quality, it does not replace supplier due diligence, and it does not prevent disputes about goods. Combine it with sample approval, a clear contract and, for higher-value orders, an independent inspection arranged through a reputable provider. Ask your bank or a trade-finance adviser whether the structure suits your situation before you commit.

Alternatives and how to decide

Many importers do not use letters of credit for every order. The right payment method depends on trust, order size, product type and your cash flow. It helps to compare the common options.

• **Advance payment (wire transfer):** simple, but it puts most of the risk on the buyer. If you use it, verify the supplier thoroughly first.
• **Deposit plus balance against documents:** a common compromise. You pay part to start production and the rest against copies of shipping documents or after inspection.
• **Open account:** the supplier ships first and you pay later. This usually requires an established relationship.
• **Documentary collection:** banks handle documents and payment but do not guarantee payment the way an L/C does.
• **Escrow or platform-based payment:** some marketplaces offer protected payment tied to delivery confirmation.
• **Letter of credit:** the most structured option, best for larger or higher-risk transactions.

If you are testing a new category, a small first order with a protected payment method may be more practical than a full L/C, especially when the supplier has not yet been verified. For regulated categories like supplements, remember that import permits and label rules in your own country are separate from payment terms, so confirm them with your authority first.

Whatever you choose, put the payment terms in the written contract, verify the supplier independently, and ask your bank for advice. Your next step is to compare your bank's trade-finance offer with the alternatives before you agree anything with the supplier.