Enforcement Rules of the Name Act Article 12

Where an application is being made in accordance with Article 11, Paragraph 1 of the Act to correct any real/legal name, an application form shall be completed, attaching such documents issued before the Act was enacted, including diplomas, work certificates, licenses, other certificates, or other documents sufficient to act as proof, to apply for correction to the household registration office where the domicile is registered.
中文原文 姓名條例施行細則第12條
依本條例第十一條第一項規定申請更正本名者,應填具申請書,檢附本條例施行前之學歷、資歷、執照、其他證件或其他足資證明文件,向戶籍地戶政事務所申請更正。

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