A foreigner staying in Korea wishing to extend his period of stay to over 90 days after arrival, or a foreigner born in Korea who wishes to extend his stay to over 90 days after the granting date of the status of sojourn, or a foreigner who will be staying in Korea for more than 90 days after arrival by receiving permission for status, must report to the Seoul Immigration office.
 
 
Seoul Immigration Office

* Tel: (+82-2) 2650-6223~4
* URL: http://www.moj.go.kr/immi/08_english/index.php
* How to Get: Subway - Get off at Omokkyo Station (Line 5) and walk 10 min.

   
  Required Documents
  Alien Registration Form (available at the district (???gu') office of residence)
Passport
School certificate or statement of employment
3 photographs (taken within 6 months, 3 X 4 cm)
A fee of 10,000 won (The Certificate of Alien Registration is issued one week after
    application at the place of registration.)
 
 

In case of misplacement of, or damage to the Certificate of Alien Registration, or if there are no more spaces for further information, or if there is a change in the contents of the Certificate, you need to visit the Seoul Immigration Office with documentation supporting the changes of the certificate and apply for a re-issuance or change of the certificate within 14 days.

If your address has changed after your registration has been submitted, it must be reported to your district office within 14 days.

 
  The Source Of Information :
SEOUL METROPOLITAN GOVERNMENT Site ( http://english.seoul.go.kr )