In Korea, men of 18 years or over and women of 16 years or over can be legally married and those under 20 need to get consent from their parents.
An international marriage should be reported at one's district (‘gu’ in Korean) office (To see gu offices in Seoul, visit City Government > Organization> Administrative Districts or click here). Those who got married before February 1, 1995 can have an international marriage certificate issued at the Civil Affairs Office located on the first floor of Seoul City Hall. Those married thereafter can have the certificates issued at each gu office where they reported their marriage.
When visiting Seoul City Hall or gu Office, applicants should present names of the then bride and the groom in English, the dates of birth and the dates of being reported. A fee of 3,300 won is required. If applicants live outside Korea, they should send 3,300 worth of check (postal money order is not acceptable) by registered postal mail with the exact mail address.
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The Source Of Information : SEOUL METROPOLITAN GOVERNMENT Site (http://english.seoul.go.kr)