If an obligor has discharged an obligation which is not due, he may not demand the return of the subject matter; provided, if the obligor discharges such obligation by mistake, the obligee shall return the benefit which he received therefrom.
Civil Act — Article 743 (Discharge prior to due date)
민법 제743조
For AI agents and developers — get this article as JSON, with the English and current Korean effective dates and an outdated-translation flag, from the korea-law API or as an MCP tool:
https://mcp.apify.com?tools=kr-data/korea-law