A null juristic act shall not become effective by ratification; provided, if the party has ratified it with the knowledge of its nullity, he shall be deemed to have performed a new juristic act.
Civil Act — Article 139 (Ratification of null acts)
민법 제139조
For AI agents and developers — get this article as JSON, with the English and current Korean effective dates and an outdated-translation flag, from the korea-law API or as an MCP tool: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