Regulations Governing Travel Agencies Article 54

When handling inbound or outbound procedures and visa application on behalf of clients, a consolidated travel agencies or Class-A travel agency shall meticulously check the authenticity of the application forms, related documents and photos of the applicant concerned, shall fill out documents according to fact, and may not allow a person other than the applicant to sign those documents that need to be signed by the applicant in person.
中文原文 旅行業管理規則第54條
綜合旅行業、甲種旅行業代客辦理出入國及簽證手續,應切實查核申請人之申請書件及照片,並據實填寫,其應由申請人親自簽名者,不得由他人代簽。

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