You have to make a reservation to visit the competent immigration office to apply or report regarding your nationality.
Application or report:
- Naturalization
- Recovery of nationality
- Determination of nationality
- Loss of nationality
- Choice of nationality
Competent Immigration office is:
- Seoul
- Seoul southern
- Busan
- Incheon
- Ansan
- Suwon
- Jeju
- Daegu
- Daejeon
- Yeosu
- Yangju
- Ulsan
- Gwangju
- Changwon
- Chuncheon
- Cheongju
- Jeonju
- Donghae
- Sokcho
Source: The Ministry of Justice