Civil Code Article 509
This English translation was last updated on 2021-01-20, but the Chinese text was amended on 2026-08-17. Later amendments may not be reflected in the translation — please refer to the Chinese text.
If, before the proprietor accepts the work, which is damaged or destroyed, or cannot be completed on account of the defects in the materials provided by him or on account of his inappropriate instructions, and if the undertaker has, immediately, notified the proprietor of such defects or such inappropriate instructions, the undertaker may demand for a part of the remuneration proportionate to the labor performed, and the return of the expenses paid in advance. The undertaker may also demand for further injury if the proprietor is negligent.
中文原文 民法第509條
於定作人受領工作前，因其所供給材料之瑕疵或其指示不適當，致工作毀損、滅失或不能完成者，承攬人如及時將材料之瑕疵或指示不適當之情事通知定作人時，得請求其已服勞務之報酬及墊款之償還，定作人有過失者，並得請求損害賠償。