South KoreaCan I claim additional treatment costs after settling a?
No, you generally cannot claim additional treatment costs after signing a full settlement agreement unless the agreement explicitly reserves that right or the new costs arise from unforeseen complications directly linked to the accident and were not reasonably foreseeable at settlement.
What the Law Says
South Korean law treats a finalized traffic accident settlement as a binding civil agreement that extinguishes all related claims — including future medical expenses — unless specific conditions are met.
Under the Civil Act, a settlement agreement (화해계약) has the effect of 'full discharge' of the parties' rights and obligations arising from the incident. Once concluded, it bars further claims based on the same facts.
The law requires that any waiver of future claims — such as unknown or developing medical conditions — must be clearly stated and agreed upon in writing. General settlement language does not automatically cover unforeseen, serious complications that emerge later.
However, if the additional treatment is for an injury directly caused by the accident and was objectively unforeseeable at the time of settlement (e.g., delayed-onset nerve damage confirmed by medical evidence), courts may consider whether the settlement intended to cover such cases — but this is rare without explicit reservation.
Statutory TextA compromise extinguishes the disputed right or obligation.
— Civil Act, Art. 735 — Effect of Compromise
What to Do
Review your signed settlement agreement for language about 'full release', 'all claims', or reservations for future medical costs.
Obtain a certified medical opinion confirming the new treatment is directly linked to the original accident and was not reasonably foreseeable at settlement.
Consult a Korean-licensed attorney before attempting to renegotiate or file a new claim — unilateral action may breach the agreement.
If the settlement was mediated through the Korea Road Traffic Authority (KoROAD), check whether their standard form includes a clause preserving rights for latent injuries.
Sources
Not legal advice. This article is general information based on publicly available sources, written for educational purposes. Laws change and individual situations vary. Consult a licensed attorney in your jurisdiction before acting on anything you read here. Last reviewed: 2026-06-08.