Enforcement Rules of the Name Act Article 9

The credentials for applying for a real/legal name alteration in accordance with Article 10 of the Act are as follows:1. Where the application is made in accordance with Subparagraph 1, the certificate carrying the real/legal name.2. Where the application is made in accordance with Subparagraph 2, the monk or nun identity certificate, or the certificate of restoration to the laity.3. Where the application is made in accordance with Subparagraph 3, the certificate issued by the organization where the person works.
中文原文 姓名條例施行細則第9條
依本條例第十條規定申請更改姓名之證明文件如下:
一、依第一款規定申請者,為載有原姓名之證件。
二、依第二款規定申請者,為出世或還俗之證明。
三、依第三款規定申請者,為服務機關證明書。

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