Negotiable Instruments Act Article 8

The appearance on a negotiable instrument of the signature of a person having no legal capacity to act or limited legal capacity to act does not affect the effect of any other signature.
中文原文 票據法第8條
票據上雖有無行為能力人或限制行為能力人之簽名,不影響其他簽名之效力。

English translation for reference only; the Chinese text prevails. Not legal advice.