CISG vs. Korean Commercial Code in South Korea: 6 Key Differences
Table of Contents
- 1. Scope of Application: Place of Business vs. Merchant Status
- 2. Incorporation of Trade Usage: Usage vs. Commercial Custom Law
- 3. Contract Formation: Offer, Acceptance, and Duty to Respond
- 4. Preservation of Goods: General Duty vs. Specific Statutory Provisions
- 5. Buyer’s Duty to Inspect and Notify Defects
- 6. Avoidance of Contract: Notice Required vs. Automatic Avoidance
- 7. FAQ
Hypothetical scenario: Company A, a South Korean textile manufacturer, entered into a seasonal fabric supply contract with Company B, an Italian fashion house. The contract specified delivery by September 30. Company A missed the deadline by a few days. Company B — without sending any notice of avoidance — signed a replacement contract with another supplier in early October, then notified Company A that “the contract is over.” Company A responded that it had never received a valid notice of avoidance and demanded payment. Under South Korea’s Commercial Code Article 68, the contract would be deemed automatically avoided in a fixed-time sale if the other party fails to immediately demand performance after the deadline passes. Under CISG Article 26, however, avoidance is effective only if communicated by notice. Whether the contract survived or not — and whether Company A can collect payment — turns entirely on which law applies.
Why the CISG–Commercial Code Gap Matters for International Business in South Korea
※ The scenario above is a hypothetical illustration for educational purposes only.
South Korea ratified the CISG on February 17, 2004, with the Convention entering into force domestically on March 1, 2005. Major South Korean trading partners — including the United States, China, Germany, and France — are all Contracting States, meaning the CISG governs a significant portion of South Korea’s international trade by default. The critical practical problem is that the CISG and South Korea’s Commercial Code reach materially different conclusions on several key issues. The sections below compare both instruments directly, citing the operative statutory text.
1. How does the scope of application differ in South Korea? — Place of Business vs. Merchant Status
The CISG uses the place of business as its trigger, while South Korea’s Commercial Code uses merchant status. This foundational difference shapes every comparison that follows.
| Issue | CISG | South Korean Commercial Code |
|---|---|---|
| Trigger criterion | Place of business in a Contracting State | Merchant status (statutory or deemed merchant) |
| Key provisions | Art. 1(1), Art. 10 | Arts. 3, 4, 5, 67–71 |
| Nationality relevant? | No (Art. 1(3)) | Not directly (merchant status governs) |
| Opt-out available? | Yes, by agreement (Art. 6) | Mix of mandatory and default rules |
CISG Scope of Application (Article 1(1))
CISG Article 1(1) provides: “This Convention applies to contracts of sale of goods between parties whose places of business are in different States: (a) when the States are Contracting States; or (b) when the rules of private international law lead to the application of the law of a Contracting State.”
CISG Article 1(3) further provides: “Neither the nationality of the parties nor the civil or commercial character of the parties or of the contract is to be taken into consideration in determining the application of this Convention.” In other words, the CISG does not distinguish between consumers and merchants — it asks only whether the parties have their places of business in different Contracting States.
Where a party has more than one place of business, CISG Article 10(a) designates as the relevant place “that which has the closest relationship to the contract and its performance, having regard to the circumstances known to or contemplated by the parties at any time before or at the conclusion of the contract.” CISG Article 6 allows the parties to “exclude the application of this Convention or … derogate from or vary the effect of any of its provisions,” giving wide latitude for party autonomy.
Scope of South Korea’s Commercial Code (Articles 3–5, 67–71)
Commercial Code Article 3 provides: “Where the act of one party is a commercial act, this Act applies to all parties.” Article 4 defines a merchant as “a person who engages in commercial acts in his/her own name.” Article 5(1) deems a person who operates a business in a commercial manner using a shop or similar establishment to be a merchant even without performing a commercial act; Article 5(2) treats a company as a merchant in all cases. The merchant-sale provisions in Articles 67 through 71 apply on the premise of a “sale between merchants.”
In summary, the CISG asks where the parties’ places of business are located, while South Korea’s Commercial Code asks whether the parties qualify as merchants. Any Korean company that enters into a cross-border sale with a counterpart based in a CISG Contracting State without specifying the governing law will find the CISG applied automatically.
2. How is trade usage treated differently in South Korea? — Usage vs. Commercial Custom Law
The CISG allows trade usage (usage) — even usage that has not attained the status of binding law — to be implicitly incorporated into a contract. South Korea’s Commercial Code grants legal-source status only to commercial custom law (상관습법), i.e., usage that has crystallized into a legally binding norm through general acceptance.
| Issue | CISG | South Korean Commercial Code |
|---|---|---|
| Scope of incorporation | Agreed usages + internationally known usages (Art. 9(1)(2)) | Only commercial custom law — usage with legal-norm status (Art. 1) |
| Key provisions | Arts. 9(1), 9(2) | Art. 1 |
| Implicit incorporation? | Yes (Art. 9(2)) | Generally no; narrow exception (Art. 29(2)) |
CISG Treatment of Trade Usage (Article 9)
CISG Article 9(1) provides: “The parties are bound by any usage to which they have agreed and by any practices which they have established between themselves.” CISG Article 9(2) adds: “The parties are considered, unless otherwise agreed, to have impliedly made applicable to their contract or its formation a usage of which the parties knew or ought to have known and which in international trade is widely known to, and regularly observed by, parties to contracts of the type involved in the particular trade concerned.” A usage that is merely regional or local, and not regularly observed in international trade of the type in question, does not qualify under Article 9(2).
South Korea’s Commercial Code Treatment (Article 1)
Commercial Code Article 1 provides: “Commercial matters shall be governed by this Act; where there is no provision herein, commercial custom law shall apply; and where there is no commercial custom law, the Civil Code shall apply.” Commercial custom law (상관습법) requires not only a recognized commercial practice but also general acceptance as a legally binding norm (opinio juris) — a higher threshold than mere trade usage. Commercial Code Article 29(2), which permits accounting practices to be governed by “generally fair and appropriate accounting practices,” illustrates one narrow area where trade usage without full legal-norm status may apply.
The practical consequence is significant: under the CISG, Incoterms and similar internationally recognized trade terms can be implicitly incorporated without express agreement, whereas under the Commercial Code alone, such implicit incorporation is generally unavailable.
3. When is a contract formed in South Korea? — Offer, Acceptance, and Duty to Respond
Three sub-issues arise here. First, the immediate-acceptance requirement for oral offers produces the same result under both instruments. Second, the moment of contract formation for offers between absent parties historically differed, but the gap has been eliminated by the deletion of the relevant Commercial Code provision in 2010. Third, the effect of silence remains a meaningful difference.
| Issue | CISG | South Korean Commercial Code |
|---|---|---|
| Oral offer between present parties | Must be accepted immediately absent special circumstances (Art. 18(2), 3rd sentence) | Lapses if not accepted immediately (Art. 51) |
| Contract formation between absent parties | Receipt theory — acceptance effective on arrival (Arts. 18(2), 23) | Receipt theory — former dispatch theory provision (old Art. 52) deleted May 14, 2010 |
| Effect of silence | Silence not acceptance in principle (Art. 18(1), 2nd sentence); exception where course of dealing exists (Art. 9(1)) | Deemed acceptance if merchant in standing relationship fails to dispatch notice without delay (Art. 53) |
| Revocation of offer | Revocable before offeree dispatches acceptance (Art. 16(1)); irrevocable offer exceptions (Art. 16(2)) | No specific provision; Civil Code principles apply |
(1) Immediate Acceptance of Oral Offers
CISG Article 18(2), third sentence, provides: “An oral offer must be accepted immediately unless the circumstances indicate otherwise.” Commercial Code Article 51 provides: “An offer to conclude a contract between parties present in the same place shall lose its effect if not immediately accepted by the other party.” Both instruments reach the same conclusion on this point.
(2) Contract Formation Between Absent Parties — The Deleted Commercial Code Provision
CISG Article 18(2) provides that an acceptance “becomes effective at the moment the indication of assent reaches the offeror,” and CISG Article 23 provides that “a contract is concluded at the moment when an acceptance of an offer becomes effective in accordance with the provisions of this Convention.” The CISG consistently applies the receipt theory.
South Korea’s Commercial Code formerly contained Article 52, which provided a dispatch-theory rule for offers between absent parties without a fixed acceptance period. That provision was deleted on May 14, 2010 (Act No. 10303). The Civil Code’s receipt theory (Civil Code Article 111) now applies, eliminating any practical difference with the CISG on this point for contracts concluded after that date.
(3) The Effect of Silence — The Duty to Respond
CISG Article 18(1), second sentence, states: “Silence or inactivity does not in itself amount to acceptance.” However, CISG Article 9(1) preserves the possibility that silence may constitute acceptance where the parties have established a relevant course of dealing.
Commercial Code Article 53, by contrast, provides: “When a merchant receives an offer to conclude a contract belonging to his line of business from a party with whom he/she maintains a standing business relationship, he/she shall dispatch a notice of acceptance or rejection without delay. Failure to do so shall be deemed acceptance.” This automatic deemed-acceptance rule — which does not require any positive act — applies without equivalent under the CISG. Any merchant in South Korea operating under the Commercial Code who receives an offer from a standing trading partner must dispatch a response or risk being bound.
4. How do preservation obligations differ in South Korea? — General Duty vs. Specific Statutory Provisions
The CISG establishes a general preservation duty applicable to both seller and buyer in a unified framework. South Korea’s Commercial Code addresses preservation obligations through separate, specific provisions covering the receiving merchant’s duty to preserve tendered goods, the seller’s right to deposit or auction, and the buyer’s duty to preserve or sell defective goods.
| Issue | CISG | South Korean Commercial Code |
|---|---|---|
| Seller’s preservation duty | Reasonable measures (Art. 85); third-party warehouse permitted (Art. 87) | Deposit or auction only (Art. 67) |
| Buyer’s preservation duty | Reasonable measures (Art. 86) | Preserve/deposit; court-authorized auction (Art. 70) |
| Self-help sale — discretionary | Any appropriate method upon unreasonable delay (Art. 88(1)) | Auction only after advance notice and reasonable period (Art. 67(1)) |
| Self-help sale — compulsory (perishables) | Duty to take reasonable steps; court authorization not required (Art. 88(2)) | Court authorization required for emergency auction (Art. 70(1)) |
| Pre-contract goods custody | Not addressed (contract-existence prerequisite) | Merchant must preserve goods tendered with rejected offer (Art. 60) |
CISG General Preservation Duty (Articles 85–88)
CISG Article 85 provides: “If the buyer is in delay in taking delivery of the goods or, where payment of the price and delivery of the goods are to be made concurrently, if he fails to pay the price, and the seller is either in possession of the goods or otherwise able to control their disposition, the seller must take such steps as are reasonable in the circumstances to preserve them.” CISG Article 86(1) imposes a parallel duty on the buyer who wishes to reject goods already received: the buyer “must take such steps to preserve them as are reasonable in the circumstances.”
On self-help sales, CISG Article 88(1) provides that a party obliged to preserve goods “may sell them by any appropriate means” if the other party unreasonably delays, provided reasonable prior notice of the intended sale is given. CISG Article 88(2) imposes a duty — not merely a right — to take reasonable steps to sell goods that are subject to rapid deterioration or whose preservation involves unreasonable expense, without requiring court authorization.
South Korea’s Commercial Code Specific Provisions (Articles 60, 67, 70)
Commercial Code Article 60 provides: “When a merchant receives an offer in the line of its business and receives samples or other goods in connection therewith, it shall preserve such goods at the offeror’s expense even if it rejects the offer.” This provision — which has no CISG equivalent — imposes a preservation duty at the pre-contractual stage.
For the seller’s self-help sale right, Commercial Code Article 67(1) provides: “In a sale between merchants, where the buyer refuses to take delivery or is unable to do so, the seller may deposit the goods or, after giving notice of a reasonable period, sell them by auction.” For the buyer’s emergency sale, Article 70(1) provides that where “there is a risk of loss or damage to the goods, the buyer may, with court authorization, sell them by auction.”
Two critical differences stand out. First, the CISG’s self-help sale right permits sale by “any appropriate means” while the Commercial Code restricts the seller to deposit or auction. Second, the CISG does not require court authorization for emergency sales of perishable goods, whereas Commercial Code Article 70(1) makes court authorization a mandatory condition.
5. How do defect inspection and notification duties differ in South Korea?
This is the area where the CISG and South Korea’s Commercial Code diverge most sharply in practice. The differences in the strictness of the inspection obligation, the outer time limit for notification, and the consequences of non-notification are all significant.
| Issue | CISG | South Korean Commercial Code |
|---|---|---|
| Inspection timing | Within as short a period as practicable (Art. 38(1)); may be deferred to destination if goods are in transit (Art. 38(2)) | Without delay (Art. 69(1)); latent defects within 6 months |
| Notification timing | Within a reasonable time after discovery or discoverability (Art. 39(1)) | Immediately upon discovery (Art. 69(1)) |
| Outer time limit | 2 years from date of actual delivery (Art. 39(2)) | 6 months from delivery for latent defects (Art. 69(1)) |
| Consequence of non-notification | Loss of right to rely on non-conformity (Art. 39); price reduction and some damages still available if reasonable excuse exists (Art. 44) | Loss of right to rescind, reduce price, or claim damages (Art. 69(1)) |
| Seller’s bad faith | Seller cannot invoke Arts. 38–39 (Art. 40) | Art. 69(1) inapplicable (Art. 69(2)) |
CISG Inspection and Notification Obligations (Articles 38–40, 44)
CISG Article 38(1) provides: “The buyer must examine the goods, or cause them to be examined, within as short a period as is practicable in the circumstances.” Where the contract involves carriage, Article 38(2) permits deferral “until after the goods have arrived at their destination.” Article 38(3) permits further deferral where goods are redirected or retransshipped in transit, provided the seller knew or ought to have known of that possibility at the time of contracting.
CISG Article 39(1) provides: “The buyer loses the right to rely on a lack of conformity of the goods if he does not give notice to the seller specifying the nature of the lack of conformity within a reasonable time after he has discovered it or ought to have discovered it.” Article 39(2) adds: “In any event, the buyer loses the right to rely on a lack of conformity of the goods if he does not give the seller notice thereof at the latest within a period of two years from the date on which the goods were actually handed over to the buyer.” CISG Article 40 bars the seller from invoking Articles 38 and 39 “if the lack of conformity relates to facts of which he knew or could not have been unaware and which he did not disclose to the buyer.” CISG Article 44 preserves the buyer’s right to reduce the price under Article 50 and to claim damages other than loss of profit, even after the notification period, if the buyer has a reasonable excuse for failure to notify.
South Korea’s Commercial Code (Article 69) and the Warranty/Incomplete-Performance Distinction
Commercial Code Article 69(1) provides: “In a sale between merchants, the buyer shall inspect the subject matter without delay upon receipt, and if a defect or shortage in quantity is discovered, shall dispatch notice to the seller immediately; failure to do so shall preclude any claim for rescission, reduction of price, or damages arising therefrom. The same applies where a latent defect in the subject matter of the sale is discovered by the buyer within six months.” Article 69(2) provides: “The preceding paragraph shall not apply where the seller acted in bad faith.”
The most significant difference is the six-month outer limit for latent defects under Article 69(1) compared to the CISG’s two-year limit. The notification standard is also stricter: Article 69(1) requires immediate dispatch, whereas the CISG requires notification within a reasonable time. The consequence of non-notification under the Commercial Code is also broader — it bars rescission, price reduction, and all damages — while the CISG’s Article 44 exception preserves partial relief where a reasonable excuse exists.
A critical qualification applies under South Korean law: the Supreme Court of South Korea held in its judgment of June 24, 2015 (Case No. 2013Da522) that Commercial Code Article 69(1) applies only to warranty claims under Civil Code Article 580, not to damages claims based on incomplete performance (불완전이행) under Civil Code Article 390. In that case, the buyer notified defects well after the six-month period; the warranty claim was rejected, but the seller’s liability for incomplete performance — consisting of the cost to remediate contaminated soil — was upheld. A buyer who has missed the six-month notification window may therefore still recover by reframing the claim as one for incomplete performance, although the burden of proving the seller’s fault then falls on the buyer. No such bifurcation exists under the CISG, which applies a unified remedial framework under Articles 45 et seq.
6. How does contract avoidance work differently in South Korea? — Notice Required vs. Automatic Avoidance
The most fundamental divergence between the CISG and South Korea’s Commercial Code on avoidance is whether a notice of avoidance is required. This difference is most acute in fixed-time sales, where the Commercial Code permits automatic deemed avoidance.
| Issue | CISG | South Korean Commercial Code |
|---|---|---|
| Grounds for avoidance | Fundamental breach (Arts. 25, 49(1)(a)); failure to deliver within Nachfrist period (Arts. 47, 49(1)(b)) | Expiry of performance deadline in fixed-time sale (Art. 68) |
| Notice requirement | Mandatory — avoidance effective only upon notice (Art. 26) | Automatic deemed avoidance if immediate performance not demanded (Art. 68) |
| Automatic avoidance | Not recognized | Recognized in fixed-time sales |
| Time to exercise avoidance right | Reasonable time after delivery (Art. 49(2)) | Immediately after deadline passes (Art. 68) |
| Effect of avoidance | Parties released from obligations; restitution; damages (Art. 81) | Restitution (Civil Code Art. 548 by analogy); damages |
CISG Avoidance (Articles 25, 26, 49, 81)
Under the CISG, the buyer may avoid the contract only where there is a fundamental breach. CISG Article 25 defines fundamental breach as a contravention “which results in such detriment to the other party as substantially to deprive him of what he is entitled to expect under the contract,” unless the breaching party could not foresee such a result. CISG Article 49(1)(b) also permits avoidance where the seller fails to deliver within an additional period of reasonable length fixed by the buyer under Article 47(1).
The critical provision is CISG Article 26: “A declaration of avoidance of the contract is effective only if made by notice to the other party.” There is no automatic avoidance under the CISG under any circumstances. CISG Article 81(1) provides: “Avoidance of the contract releases both parties from their obligations under it, subject to any damages which may be due.”
South Korea’s Commercial Code — Automatic Avoidance in Fixed-Time Sales (Article 68)
Commercial Code Article 68 provides: “In a sale between merchants, where the nature of the sale or the declaration of intention of the parties indicates that the purpose of the contract cannot be achieved if performance is not made at a fixed time or within a fixed period, and one party fails to perform at the time for performance, the other party shall be deemed to have avoided the contract unless it immediately demands performance.”
This provision differs from the CISG in two fundamental respects. First, the mere expiry of the performance deadline triggers automatic deemed avoidance without any notice of avoidance — the contract disappears by operation of law. Second, it is the party that wishes to keep the contract alive who must act, by immediately demanding performance. In practice, any Korean company in a fixed-time sale governed by the Commercial Code must issue an immediate demand for performance the moment a deadline passes if it wants to preserve the contract. Under the CISG, the same company could wait for an explicit avoidance notice before treating itself as released from its obligations.
7. FAQ
Cross-border transactions involving South Korean companies routinely present the CISG–Commercial Code choice-of-law question. In practice, contracts without a governing law clause are among the most common sources of international commercial disputes handled by our firm. The differences identified in this article — particularly the two-year versus six-month notification period, the notice requirement for avoidance under CISG Article 26, and the automatic avoidance rule under Commercial Code Article 68 — have determined the outcome of real disputes. Identifying and resolving the governing-law question at the contract drafting stage is the single most cost-effective step parties to international sales transactions involving South Korea can take.
※ This article is provided for general informational purposes only and does not constitute legal advice. The applicable law and legal conclusions may vary depending on the specific facts and circumstances of each case. Please consult a qualified attorney before taking any action.