Korea Contract Dispute After Non-payment by a Foreign Buyer, What Suppliers Should Do

When a Korean buyer stops paying, a foreign supplier’s entire commercial position can unravel within weeks, receivables age, evidence disappears, and assets may be moved beyond reach. Handling a Korea contract dispute after non-payment by a foreign counterparty demands immediate, structured action grounded in Korean procedural law, not the home-country instincts most exporters rely on. At Ahnse Law Offices, I regularly advise international suppliers navigating exactly this situation, and the difference between recovering the full claim and writing off the debt almost always comes down to the speed and quality of the first few steps.

This guide sets out the practical playbook I walk clients through, from pre-action preservation and demand letters, through provisional attachment in Korea, to final judgment or arbitral enforcement.

Can Foreign Suppliers Sue in Korea for Contract Non-Payment?

Yes. There is no nationality restriction preventing a foreign company from commencing a civil action in Korean courts. Under the Korean Civil Procedure Act, Korean courts will accept jurisdiction where the defendant is domiciled in Korea, the contractual obligation was to be performed in Korea, or the parties agreed to Korean jurisdiction in their contract. Even without an express jurisdiction clause, Korean courts routinely assert jurisdiction when a Korean buyer received goods or services destined for Korea and the disputed payment obligation arose there.

The practical question is not whether you can sue, but whether you should sue in Korea versus pursuing the dispute in your home jurisdiction or through arbitration. The decisive factors are:

• Location of the buyer’s assets. If the debtor’s bank accounts, real property and business operations are all in Korea, a Korean judgment is the most direct route to enforcement.
• Existence of an arbitration clause. If your contract specifies arbitration, Korean courts will generally decline jurisdiction over the merits and refer you to arbitration.
• Urgency of provisional measures. Korean courts have robust provisional attachment mechanisms that can freeze assets within days, a powerful lever that may not be available (or as fast) in a foreign forum.

In my experience, for the majority of unpaid-invoice claims involving a Korean buyer with assets in Korea, commencing proceedings in Korea, or at minimum applying for provisional attachment here, produces the best outcome.

First Steps to Take Immediately Before Any Legal Filing

The period between the first missed payment and the first court filing is where most cases are won or lost. In a Korea contract dispute after non-payment, the pre-action phase is not passive, it is the phase in which you build your evidence, preserve your leverage, and position the case for the strongest possible outcome. Below is the ten-point checklist I give every client.

Evidence Preservation Checklist

1. Locate and secure the original contract. Obtain the signed version, not a draft, together with any amendments, side letters or purchase orders. If the contract is in Korean, commission a certified translation immediately.
2. Compile all invoices and proof of delivery. Gather every invoice, bill of lading, airway bill, warehouse receipt and delivery confirmation. Korean courts place heavy weight on documentary evidence of performance.
3. Trace all payment records. Assemble bank statements, wire-transfer confirmations and any partial payments. These establish both the pattern and the point at which payment stopped.
4. Preserve all correspondence. Save emails, KakaoTalk messages, WeChat records and any other communications discussing the debt, payment promises or excuses. Screenshot and notarise where possible.
5. Conduct a credit check on the buyer. Use Korean corporate registry records (available through the Supreme Court Internet Registry) to confirm the buyer’s registered address, directors and corporate status. If the company is in financial distress, speed is critical.

Demand Letter: Timing and Content

A demand letter is not merely a formality, in Korea, it serves as evidence of the creditor’s intent and can accelerate provisional attachment applications. I recommend sending the letter by both registered international mail and email within seven days of the first default. The demand letter should contain:

• Identification of the contract (date, parties, subject matter).
• The precise amount outstanding, with invoice references and due dates.
• A clear demand for payment within a specified period (typically 14 days).
• A statement of consequences, that legal proceedings, including applications for provisional attachment of assets, will follow if payment is not received.
• Reservation of all rights, including the right to claim interest and legal costs.

A sample demand-letter opening paragraph might read: “We refer to the Supply Agreement dated [date] between [Supplier] and [Buyer]. Invoices numbered [X] through [Y], totalling KRW [amount] / USD [amount], remain unpaid as of [date], notwithstanding repeated requests for payment. We hereby formally demand payment in full within fourteen (14) days of this letter. Failure to pay will result in the commencement of legal proceedings in Korea, including an application for provisional attachment of your assets, without further notice.”

Commercial Preservation Steps

• Notify your trade-credit insurer (if applicable) of the default within the policy notification window.
• Consider halting further shipments until payment is received. Under the Korean Civil Act, a supplier may exercise a right of simultaneous performance (동시이행의 항변권) and withhold further deliveries where the buyer has failed to perform its reciprocal obligation.
• Identify the buyer’s assets. Before filing, instruct Korean counsel to conduct asset searches, real-property registries, vehicle registrations and corporate filings can reveal attachable property.
• Engage Korean litigation counsel early. Local counsel can send the demand letter on Korean-law letterhead, which significantly increases the pressure on the debtor and demonstrates genuine intent to litigate.

Deciding Forum: Korean Court Litigation vs Arbitration

The forum question is critical. Choosing the wrong path can cost months and limit provisional remedies. Here is how I advise clients to decide.

If You Have an Arbitration Clause

If the contract contains an arbitration clause, whether specifying the Korea Commercial Arbitration Board (KCAB), the ICC, SIAC or another institution, Korean courts will generally refer the dispute to arbitration and decline to hear the merits. However, even where an arbitration clause exists, Korean courts retain the power to grant provisional attachment under the Korean Civil Execution Act. This means you can apply for a provisional attachment in a Korean court while simultaneously commencing arbitration.

Arbitral awards rendered under a New York Convention seat are enforceable in Korea, making arbitration a viable route where the contract provides for it. The downside is that arbitration can be slower to initiate and more expensive for smaller claims.

If There Is No Arbitration Clause

Where there is no arbitration clause and the contract is silent on jurisdiction, Korean courts will generally accept jurisdiction based on the buyer’s domicile or the place of contractual performance. Filing directly in a Korean district court gives you access to the full range of provisional measures from the outset and keeps costs lower than international arbitration for mid-sized claims.

The decision flow I recommend:

• Arbitration clause present → commence arbitration + apply for provisional attachment in Korean court simultaneously.
• No arbitration clause, buyer’s assets in Korea → file in Korean court directly.
• No arbitration clause, assets outside Korea → consider whether a Korean judgment will be recognised in the jurisdiction where assets are located, or whether suing in that jurisdiction is faster.

Korea Contract Dispute Remedies Before Judgment: Provisional Attachment and Other Pre-Judgment Measures

Provisional attachment in Korea is, in my view, the single most powerful tool available to a foreign creditor. It allows you to freeze a debtor’s assets, bank accounts, real property, receivables, vehicles, before you even obtain a judgment. The legal basis is the Korean Civil Execution Act, which provides for provisional seizure (가압류) and provisional disposition (가처분).

How Provisional Attachment Works

A creditor files a petition with the competent court (usually the court in the district where the debtor’s assets are located), supported by documentary evidence of the claim and a declaration explaining the risk that the debtor may dissipate assets. The court may grant the order ex parte, that is, without notifying the debtor, if the risk of dissipation is sufficiently demonstrated. In practice, Korean courts regularly grant provisional attachment orders within days of filing.

The creditor is typically required to post security (a bond or cash deposit), often in the range of 10–30 per cent of the claim amount, to protect the debtor against wrongful attachment. This security is returned once the creditor obtains a favourable judgment.

Evidence Required for Attachment

Korean courts require credible, prima facie evidence, not proof beyond reasonable doubt. In practice, the following documents form the core of a strong application:

• Signed contract and any amendments.
• Invoices and proof of delivery (bills of lading, delivery receipts).
• Bank records showing partial or stopped payments.
• Correspondence demonstrating the debtor’s awareness of the debt and any excuses or refusals.
• A declaration from the creditor explaining the urgency and the risk of dissipation (for example, evidence that the debtor is transferring assets, reducing capital, or facing other creditor claims).

Using Provisional Attachment as Leverage

In my experience, provisional attachment frequently produces a settlement before the main proceedings even reach a hearing. When a Korean company discovers that its bank accounts have been frozen, the commercial pressure to negotiate is immediate and intense. The attachment effectively shifts the power dynamic from the debtor, who has been enjoying the use of the creditor’s money, to the creditor, who now controls the pace of resolution. This is why I advise every client facing a Korea contract dispute after non-payment to consider applying for provisional attachment as the first litigation step, not as a last resort.

Commencing a Civil Suit in Korea: Procedure, Timeline and Costs

If provisional measures alone do not produce a settlement, the next step is to file a civil suit on the merits. Here is what the process looks like in practice.

Statute of Limitations for Contract Claims

Under the Korean Civil Act, the general statute of limitations for contractual claims is ten years from the date the right can be exercised. However, commercial claims between merchants are subject to a shorter five-year limitation period under the Korean Commercial Act. Certain specific claims, such as claims for the price of goods sold by a merchant, may be subject to even shorter periods. I strongly recommend that suppliers take action well within these windows, because delay can also weaken your position on provisional remedies.

Service of Process on a Korean Company from Abroad

If you are filing in Korea, service on a Korean defendant is handled domestically by the Korean court, this is straightforward and fast. If you need to serve a Korean company from a foreign jurisdiction, Korea is a party to the Hague Service Convention, and service must comply with its requirements. Conversely, if you have already obtained a foreign judgment and wish to enforce it in Korea, service of the enforcement proceedings is domestic.

The table below outlines the typical timeline for a contested commercial claim in a Korean district court:

Court filing fees in Korea are calculated as a percentage of the claim amount and are modest by international standards. For a KRW 1 billion claim (approximately USD 750,000), the filing fee is a fraction of what a comparable ICC arbitration would cost. Attorney fees are a separate cost and vary depending on complexity.

Recognition and Enforcement of Foreign Judgments in Korea

Some foreign suppliers arrive at my desk with a judgment from their home jurisdiction, an English High Court order, a US federal judgment, a German Landgericht decision, and ask whether they can simply enforce it in Korea. The answer is: it depends.

Steps to Enforce a Foreign Judgment in Korea

Under the Korean Civil Procedure Act, a foreign judgment may be recognised and enforced in Korea if it meets four conditions: the foreign court had jurisdiction under Korean conflict-of-law principles; the defendant was properly served; the judgment does not violate Korean public policy; and there is reciprocity, meaning that Korean judgments would receive equivalent treatment in the foreign court’s jurisdiction.

The reciprocity requirement is the most frequent obstacle. Korean courts have recognised judgments from jurisdictions including the United States, the United Kingdom and Germany, but each case is assessed individually. The enforcement process requires filing a separate action in a Korean court seeking an execution judgment (집행판결).

When to Prefer a Fresh Korean Judgment

In my practice, I often recommend that foreign creditors file directly in Korea rather than seeking to enforce a foreign judgment, for three reasons:

• Speed. Obtaining a fresh Korean judgment can be faster than the combined time of litigating abroad, obtaining judgment, and then running a recognition/enforcement action in Korea.
• Provisional measures. Filing in Korea gives immediate access to provisional attachment, you cannot obtain Korean provisional attachment to support a foreign judgment that has not yet been domesticated.
• Certainty. A Korean judgment faces no reciprocity or public-policy challenge; it is directly enforceable against Korean assets.

Practical Negotiation and Settlement Tips Once Litigation Starts

Litigation in Korea frequently settles, and provisional attachment is a major catalyst. Once a debtor’s assets are frozen, the dynamics change. Here are the settlement tactics I find most effective in a Korea contract dispute after non-payment:

• Negotiate from the attachment. Do not release the attachment until a binding settlement is signed and security is provided (escrow deposit, bank guarantee, or promissory note with a notarised enforcement clause).
• Use court-mediated settlement. Korean courts actively encourage settlement during proceedings. A court-mediated settlement has the same force as a final judgment and is immediately enforceable.
• Draft the settlement agreement under Korean law. Include a choice-of-law clause specifying Korean law, a Korean jurisdiction clause for any breach of the settlement itself, and a clause permitting immediate enforcement without further proceedings (공정증서 or equivalent).
• Insist on security. A settlement without security is only as strong as the debtor’s willingness to pay. Require a bank guarantee, escrow, or irrevocable standby letter of credit as a condition of releasing the provisional attachment.

Sample Templates and Checklists

Below are the core checklists I provide to clients preparing to pursue a non-payment claim in Korea. These are starting points, each case requires adaptation based on specific facts and Korean counsel’s advice.

Pre-Action Preservation Checklist

• Original signed contract and all amendments / side letters.
• All purchase orders and order confirmations.
• Every invoice issued, with due dates.
• Bills of lading, airway bills, delivery receipts and warehouse records.
• Bank statements showing payments received and payments missed.
• All correspondence (email, KakaoTalk, WeChat, fax, letters) regarding the debt.
• Corporate registry extract for the buyer (Korean Supreme Court Internet Registry).
• Asset-search results (property registry, vehicle registry, corporate filings).
• Trade-credit insurance policy and notification records (if applicable).
• Certified translations of all key documents into Korean.

Provisional Attachment Evidence Checklist

• Prima facie evidence of the claim (contract + invoices + delivery proof).
• Evidence of non-payment (bank records, unanswered demand letters).
• Declaration of urgency explaining the risk of dissipation.
• Any evidence of debtor’s financial distress (other creditors, reduced capital, asset transfers).
• Details of the debtor’s attachable assets (bank account details, property addresses, receivables).
• Security bond (cash or guarantee) in the amount the court may require.

Court Filing Document Checklist

• Complaint (소장) drafted in Korean, signed by Korean counsel.
• Power of attorney from the foreign plaintiff to Korean counsel (notarised and apostilled).
• Evidence bundle with numbered exhibits and Korean translations.
• Certificate of corporate registration for the foreign plaintiff (apostilled).
• Court filing fee payment receipt.

Conclusion

A Korea contract dispute after non-payment by a foreign buyer is recoverable, but only if you act quickly, preserve your evidence, and use the full range of Korean procedural tools available to you. The most important steps are: secure your documentary record immediately; send a properly drafted demand letter within days of the first default; instruct Korean counsel to conduct asset searches; and apply for provisional attachment before the debtor has any opportunity to dissipate assets. Whether you proceed through Korean court litigation or arbitration, the provisional attachment mechanism under the Korean Civil Execution Act is the lever that consistently delivers results.

In my years advising foreign creditors at Ahnse Law Offices, I have seen time and again that the suppliers who act within the first two weeks of non-payment are the ones who recover in full. Those who wait rarely achieve the same outcome. If you are facing a non-payment situation with a Korean counterparty, engage Korean litigation counsel without delay and start building your case from day one.

Sources

1. Korea Legislation Research Institute (KLRI), Korean Statutes in English
2. Supreme Court of Korea, English Portal
3. Ministry of Justice, Republic of Korea
4. Korean Bar Association
5. Korea Commercial Arbitration Board (KCAB)