Defenses incidental to the contract mentioned in Article 539 may be set up by the obligor against the third person who is to receive the benefit of the contract.
Civil Act — Article 542 (Obligor's right to defend)
민법 제542조
For AI agents and developers — get this article as JSON, with the English and current Korean effective dates and an outdated-translation flag, from the korea-law API or as an MCP tool: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