Enforcement Rules of the Name Act Article 3
The real/legal name of a national registered in a household shall be identified by the National Identification Card. In contrast, the real/legal name of a person under the age of fourteen can be identified by the household certificate or the household registration transcript as a substitute.With a person who applies for naturalization or restoration of nationality, before his/her household registration, his/her real/legal name shall be identified by the permit of naturalization or restoration of nationality. The real/legal name of an R.O.C.（Taiwan） national residing overseas without household registration in the R.O.C. may be identified by one of the following documents:1. Passport.2. Overseas Compatriot Identity Certificate.3. Overseas Compatriot Registry Certificate.4. Nationality Certificate.5. A credential containing his/her formal Chinese name, and certified by an R.O.C. embassy, consulate, representative office, or office (hereinafter referred to as the “Diplomatic Mission”):(1) Identity document or any other certificate issued by the R.O.C. government.(2) Certificate issued by an overseas school (non-military) registered (or filed) with an R.O.C. government agency.(3) Certificate issued by an overseas compatriot association registered with the competent government authority.(4) Other documents certified by a Diplomatic Mission.
中文原文 姓名條例施行細則第3條
在國內設有戶籍國民其本名之證明為國民身分證，未滿十四歲者，得用戶口名簿或戶籍謄本代替之。
申請歸化、回復國籍者，於設戶籍前，本名之證明為歸化、回復國籍許可證書。
僑居國外國民在國內未曾設有戶籍者，得以下列文件為本名之證明：
一、護照。
二、華僑身分證明書。
三、華僑登記證。
四、國籍證明書。
五、載有中文姓名，且經我國駐外使領館、代表處或辦事處（以下簡稱駐外館處）審查屬實之下列證明文件：
（一）我國政府核發之身分證明或其他證明文件。
（二）經政府機關立（備）案之華僑（文）學校製發之證書。
（三）經主管機關登記有案之僑團、僑社核發之證明書。
（四）其他經駐外館處審查屬實之文件。
申請歸化、回復國籍者，於設戶籍前，本名之證明為歸化、回復國籍許可證書。
僑居國外國民在國內未曾設有戶籍者，得以下列文件為本名之證明：
一、護照。
二、華僑身分證明書。
三、華僑登記證。
四、國籍證明書。
五、載有中文姓名，且經我國駐外使領館、代表處或辦事處（以下簡稱駐外館處）審查屬實之下列證明文件：
（一）我國政府核發之身分證明或其他證明文件。
（二）經政府機關立（備）案之華僑（文）學校製發之證書。
（三）經主管機關登記有案之僑團、僑社核發之證明書。
（四）其他經駐外館處審查屬實之文件。