Hello, this is Attorney Oh Seung-hyun of Cheongchul Law Firm.

If you work as an insurance agent, you often hear frustrated clients say, "My insurance claim was denied." Insurers cite a wide range of reasons for denial: breach of the duty of disclosure, exclusion clauses, suicide, drunk driving, and more. Yet the courts overturn a substantial share of those denials.

Moreover, recent rulings show that an agent who fails to properly perform the duty to explain may face an indemnity claim from the insurer or be held directly liable in damages to the client. This article organizes the types of insurance benefit disputes agents most frequently encounter in the field, together with the courts’ standards, focusing on actual cases.

① Breach of the Duty of Disclosure – When Benefits Are Still Paid and When They Are Not

False Statement of Occupation → Claim Dismissed in Full (Seoul Southern District Court 2022Gadan254684)

An apartment exterior painter falsely listed his occupation as "site manager at a construction company" when applying for insurance. In 2022, he fell to his death while painting an exterior wall, and his bereaved family claimed a death benefit of KRW 100 million.

The Seoul Southern District Court (decided April 17, 2024, final) held that occupation is a "material fact" as a written question item under Commercial Act Article 651-2 (상법 제651조의2), and that a painter listing himself as a site manager constituted a breach of the duty of disclosure by intent or gross negligence. The court also found that the insurer’s termination notice had been lawfully delivered and dismissed the claim in its entirety. This case shows that where a false statement of occupation is clear, the courts side with the insurer.

• Practical point: When a client in a high-risk occupation (painter, welder, work at heights, etc.) applies, make sure the stated occupation matches the actual one.

Termination Right Time-Barred → Termination Invalid BUT the Exclusion Clause Is Separate (Uijeongbu District Court 2023Na227365)

The insured did not disclose treatment for diabetes and hypertension when purchasing insurance in 2016. After later being diagnosed with stage 5 chronic kidney disease and undergoing a kidney transplant, the insured claimed a disease-related disability benefit of KRW 40 million. The insurer exercised its termination right by service of a copy of the complaint in 2022, but more than three years had already passed since the contract date (2016).

The Uijeongbu District Court (decided January 22, 2026, final) held that the termination right may only be exercised within three years from the contract date, so the termination itself was unlawful. But an important legal principle was confirmed here. The court ruled that "the termination right for breach of the duty of disclosure (three-year exclusion period) and the exclusion clause under the policy terms are separate matters." Because diabetes and hypertension were recognized as the direct cause of the chronic kidney disease, the exclusion clause applied regardless of the termination, and the court concluded there was no obligation to pay the benefit.

• Key principle: Even if the exclusion period for the termination right has lapsed, the exclusion clause can still apply (agents should distinguish the two concepts when explaining to clients).

Breach of the Duty of Disclosure + No Causation Means the Benefit Must Be Paid

The Supreme Court has consistently held that "if there is no causal link between the undisclosed fact and the insured event, the insurer may terminate the contract but cannot refuse to pay the benefit." For example, even if a history of hypertension was not disclosed, where the insured dies in a traffic accident there is no medical causation between hypertension and death in a traffic accident, so the benefit must be paid. The burden of proving the absence of causation lies with the policyholder, so securing a medical opinion is critical in a dispute.

② Suicide and Accidental Death Benefits – Policy Interpretation Decides

Suicide More Than Two Years After Enrollment → Accidental Death Benefit Paid (Supreme Court 2015Da243347)

The insured purchased a policy that included an accidental death rider (coverage KRW 50 million) and died by suicide more than two years after the commencement date of liability. The insurer refused payment, arguing that suicide lacks fortuity and is therefore not an accident.

The Supreme Court (decided May 12, 2016) overturned the insurer’s denial. The policy contained a proviso: "No benefit shall be paid where the insured intentionally harms himself or herself. However, this shall not apply where the insured dies by suicide after two years have passed from the commencement date of liability." The Supreme Court interpreted this proviso as exceptionally including suicide after two years within the scope of insured events, applied the contra proferentem rule (ambiguities are construed in favor of the customer), and ordered payment of the KRW 50 million accidental death benefit.

• Practical point: When you receive a complaint about a denied suicide claim, first check whether the policy contains a "two-year exception clause."

Suicide in a State of Mental Incapacity Due to Depression Is Also Covered

Accident insurance policy terms exclude from the exemption cases where "the insured harms himself or herself in a state, such as mental incapacity, in which he or she cannot make a free decision." The Supreme Court has consistently held that where the insured died by suicide in a state in which the ability to make free decisions was markedly impaired due to major depressive disorder, and there is medical opinion proving this, the accidental death benefit must be paid. When the family of a suicide victim claims benefits, psychiatric treatment records and a medical opinion proving the state of mental incapacity are the key evidence.

③ Insurance Fraud – A Criminal Conviction Does Not Automatically Void the Contract

70 False Hospitalizations Totaling 1,348 Days → Criminal Conviction, but Contract Nullification Dismissed (Seoul Southern District Court 2018Gadan215736)

From 2008 to 2015, the defendant repeatedly made false and excessive hospital admissions, 70 times for a total of 1,348 days, and obtained approximately KRW 270 million in insurance benefits by fraud. The defendant was sentenced to two years in prison, suspended for two years, for fraud. The insurer filed a civil action seeking to nullify the insurance contract itself and recover all benefits already paid.

The Seoul Southern District Court (decided January 10, 2019, appeal dismissed, final) accepted only part of the insurer’s claims. Because there was a seven-year gap between the conclusion of the contract (2001) and the start of the fraudulent conduct (2008), the court found the circumstantial evidence insufficient to show an intent to obtain benefits improperly from the time the contract was concluded, and dismissed the claim to nullify the contract. Even with a criminal conviction, civil nullification of the contract must be proven separately. However, the court did order the return of KRW 16.22 million in benefits corresponding to the false hospitalizations as unjust enrichment and tort.

• Practical point: Promptly reporting clients who show a pattern of excessive claims from early in the contract to the insurer’s SIU (Special Investigation Unit) is key to minimizing insurance fraud losses.

④ When Agents Are Held Directly Liable – Breach of the Duty to Explain and Indemnity Claims

Failure to Explain the Duty of Notification → Agent Ordered to Pay the Insurer KRW 21.1 Million (Seoul Central District Court 2022Gadan5012698)

In 2008, an insurance agent brokered an accident insurance policy (general accidental death and disability, KRW 100 million each) without explaining to the insured the "duty of notification," that is, the obligation to notify the insurer when the insured’s occupation changes. The insured later changed jobs from a print shop to installing apartment fire-escape stairs but did not notify the insurer. When a fall accident occurred in 2019, the insurer was unable to assert a breach of the duty of notification and paid approximately KRW 88.8 million without the proportional reduction based on occupational class. The insurer then sought indemnity from the agent.

The Seoul Central District Court (decided November 23, 2022, final) held that the duty to explain is an obligation an insurance agent must naturally know and perform as part of the profession, and that the agent bears personal responsibility regardless of whether the company provided training. The court found causation between the agent’s breach of the duty to explain and the excess benefit payment, but considering that the insurer also had a duty to verify at underwriting whether the duty to explain had been performed, it limited liability to 50% and ordered the agent to pay the insurer approximately KRW 21.1 million.

• Key warning: At contract signing, agents must explain the duty of notification (changes in occupation or hobbies, increased risk) and obtain a signature. Failure to do so can result in an indemnity claim of tens of millions of won.

Breach of the Duty to Explain and the Suitability Principle in Variable Insurance → Insurer and Agent Jointly Liable for KRW 156 Million (Seoul High Court 2009Na97606)

An insurance agent sold three universal and variable universal life policies to a company’s representative without adequately explaining the risk of principal loss and the possibility that surrender values could fluctuate. In particular, the agent explained the variable insurance on the premise of high returns, hindering the client’s awareness of the risks. The policyholder paid approximately KRW 397 million in premiums but received only about KRW 227 million upon surrender, suffering a loss of approximately KRW 170 million.

The Seoul High Court (decided March 31, 2010) held that because variable insurance carries a risk of principal loss, a heightened duty to explain applies compared with ordinary insurance. It also found a breach of the suitability principle for recommending a high-risk product without assessing the client’s investment propensity. Notably, the court refused to apply comparative negligence, stating that "the victim’s fault caused by the breach of the duty to explain cannot be separately assessed," and ordered the insurer and the agent jointly to pay approximately KRW 156 million to the plaintiff company and approximately KRW 14.23 million to Plaintiff 2.

• Key warning: When selling variable insurance, failing to verify, explain, and document the risk of principal loss, fluctuations in surrender value, and the client’s investment propensity exposes you to liability for hundreds of millions of won.

Dispute Prevention Checklist for Insurance Agents

Essential Items to Confirm at Contract Signing

• ✅ Have the policyholder personally fill in the disclosure items (occupation, health status, pre-existing conditions).

• ✅ For high-risk occupations (construction, painting, welding, etc.), clearly explain the occupational class and its effect on benefits.

• ✅ Explain exclusion clauses (suicide, drunk driving, occupational restrictions, etc.) in specific terms and obtain a signature.

• ✅ Always explain the duty of notification (reporting changes in occupation or hobbies to the insurer) and keep a written record.

• ✅ When selling variable insurance, cover the risk of principal loss, assess the client’s investment propensity, and record the conversation or prepare a written confirmation of explanation.

Guidance Points When a Client’s Claim Is Denied

• ① If a breach of the duty of disclosure is alleged → check the medical causation between the undisclosed fact and the insured event.

• ② Timing of delivery of the termination notice → check whether it was within three years of the contract date (exclusion period).

• ③ Exclusion clauses → check whether the duty to explain was performed at contract signing.

• ④ Suicide benefits → review whether the policy contains a two-year exception clause and whether mental incapacity can be proven.

• ⑤ If legal action is needed in any of the above disputes, refer the client to an insurance specialist lawyer.

Closing

An insurer’s denial of a claim does not automatically mean the denial is legally justified. Where there is no causation between the breach of the duty of disclosure and the insured event, where the exclusion clause was not adequately explained, or where the policy contains a two-year suicide exception, the courts are ordering benefits to be paid. Conversely, the case law clearly warns that agents who neglect their own duty to explain may face indemnity liability of tens of millions of won.

If a client needs legal help in an insurance benefit dispute, please refer them to Cheongchul Law Firm for a free consultation. We will review the full range of insurance disputes, including breach of the duty of disclosure, exclusion clause disputes, and suicide benefit claims, and protect your client’s rights to the fullest.

Thank you.