Can a Letter of Intent (LOI) or MOU Become Legally Binding in Korea?

Short Answer

Yes, potentially. A Letter of Intent (LOI) or Memorandum of Understanding (MOU) may become legally binding in Korea, even if the parties intended it to serve only as a preliminary document.

Whether an LOI or MOU creates enforceable obligations depends not on its title, but on its wording, the parties' objective intentions, the surrounding circumstances, and the applicable law.

Many cross-border disputes arise because one party believes the document was non-binding, while the other argues that it created binding contractual obligations.

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Does Calling a Document an "LOI" or "MOU" Prevent It from Being Binding?

No.

Under Korean law, courts generally look beyond the document's title and focus on what the parties actually agreed to.

A document labelled "Letter of Intent," "Memorandum of Understanding," "Term Sheet," or "Heads of Agreement" may still create binding legal obligations if the parties intended it to do so.

Conversely, even a document called a "Contract" may leave important obligations unresolved if essential terms remain open for future negotiation.

The title alone rarely determines the legal outcome.

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Which Provisions Are Commonly Intended to Be Binding?

Even where the overall document is intended to be non-binding, certain provisions are frequently drafted to become immediately enforceable.

Confidentiality

The parties often agree that confidential information disclosed during negotiations must remain protected regardless of whether the final transaction proceeds.

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Exclusivity

An LOI may prohibit one party from negotiating with competing buyers, investors, or business partners for a specified period.

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Governing Law and Dispute Resolution

The parties may agree in advance on which law governs disputes relating to the LOI itself and where those disputes will be resolved, even if the definitive agreement is never signed.

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Costs and Expenses

The parties may allocate responsibility for due diligence costs, legal fees, accounting fees, or other transaction expenses, regardless of whether the proposed transaction ultimately closes.

These provisions are often intended to survive even if negotiations end without a final agreement.

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When Do Disputes Usually Arise?

Problems often arise because the parties begin performing the transaction before signing the definitive agreement.

For example:

• A supplier begins manufacturing products.
• Technical information or proprietary know-how is shared.
• Deposits or advance payments are made.
• Significant due diligence costs are incurred.
• One party declines other business opportunities in reliance on the proposed transaction.

If negotiations later collapse, the parties may disagree over whether the LOI or MOU merely outlined future negotiations or already created legally enforceable obligations.

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How Can Foreign Companies Reduce Legal Risk?

Foreign companies should avoid leaving the legal status of the document uncertain.

An LOI or MOU should clearly distinguish between binding provisions and non-binding provisions.

The document should expressly state:

• Which clauses are legally binding.
• Which provisions are only intended to facilitate further negotiations.
• Whether either party may terminate negotiations without liability.
• Whether execution of a definitive agreement is a condition before any commercial obligations arise.
• Whether either party may rely on preliminary discussions or drafts.

Clear drafting significantly reduces the risk of later disputes over whether the parties had already entered into a binding agreement.

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Practical Drafting Tips

Before signing an LOI or MOU involving a Korean company, foreign businesses should consider:

• Clearly identifying which provisions are binding and which are not.
• Avoiding vague language that may suggest a final agreement has already been reached.
• Specifying whether negotiations may be terminated freely or only under certain conditions.
• Defining the duration of confidentiality and exclusivity obligations.
• Ensuring that the definitive agreement supersedes prior negotiations and preliminary documents where appropriate.

These issues are much easier to resolve before negotiations progress than after a dispute develops.

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Conclusion

An LOI or MOU should never be treated as "just a preliminary document."

In Korea, its legal effect depends on what the parties objectively agreed—not simply on what they called the document.

Carefully drafted preliminary agreements can help protect confidential information, structure negotiations, and reduce uncertainty while avoiding unintended contractual obligations before the definitive agreement is executed.

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