How to Report a Child's Birth Abroad to Korea (and Why the ID Number Shows Only 6 Digits)

If your child was born outside Korea and one parent is Korean, your child can be registered as a Korean citizen. The short answer: you can report the birth to Korea without flying home, through a Korean embassy or a Korean administrative agent (행정사). But the child's resident registration number will show only the first 6 digits until the child actually registers as a resident in Korea.

Our child was born in Vietnam in 2019, and we moved to Korea in 2023. Here is how it worked for us.

1. Does my child get Korean nationality?

Yes, in most cases. Korea follows the bloodline principle: if the father or mother is a Korean citizen when the child is born, the child is Korean no matter where the child was born.

But nationality alone is not enough. You need to report the birth so the child is added to the Korean family register (가족관계등록부).

2. Two ways to report a birth from abroad

Option	How it works
Korean embassy or consulate	Submit the documents at the Korean embassy or consulate in the country of birth. They send it to Korea.
Korean administrative agent (행정사)	A licensed agent in Korea files the report for you. Useful if the embassy is far away or you are busy. There is a fee.

3. Documents you will usually need

• Birth report form (출생신고서)
• Birth certificate issued in the country of birth
• Korean translation of the birth certificate (an apostille or consular confirmation may also be required)
• ID or passport of the parent who reports
• Your marriage must already be registered in Korea. If not, report the marriage first.

Tip: Requirements can differ by embassy and by case. Check with the embassy or your agent before you prepare documents.

4. Our experience: reporting from Vietnam

We were living in Vietnam when our child was born, and going to the Korean embassy was not easy for us. So we did it this way:

• A local Vietnamese agent prepared the Vietnamese documents and passed them to a Korean administrative agent (행정사).
• The Korean agent filed the birth report in Korea. The birth happened in Vietnam, but the report was processed normally in Korea.
• Time: about 7 days until it was processed
• Cost: about ₩400,000 in total (in our case, 2019)

If you live near a Korean embassy, doing it yourself is cheaper. If not, an agent can save a lot of time.

5. Why the ID number showed only 6 digits

This confused us at first. After the birth report, our child's documents showed the resident registration number like this:

YYMMDD-XXXXXXX

Only the first 6 digits (date of birth) appeared. The back 7 digits were not given yet.

This is normal. The full number is given when the child registers as a resident in Korea. A child who lives abroad is in the family register, but is not yet a registered resident.

6. After you move to Korea

1. Register your address at the local community center (주민센터, also called 행정복지센터). Bring the child's passport.
2. The child gets a full resident registration number.
3. Then you can add the child to health insurance as a dependent, apply for child benefits, and register for school.

Children under 19 of an employee do not need to wait 6 months for health insurance. See my previous post on health insurance for foreign spouses and children.

Important for foreign spouses: When you register your address, your foreign spouse does not appear on the Resident Registration copy (주민등록등본) automatically. Foreigners are registered separately through the Alien Registration Card.

After your spouse gets the Alien Registration Card, ask the community center to add your spouse to your Resident Registration copy. We did this early, and it made later paperwork easier. For example, our Resident Registration copy showed my wife, which helped when we registered her for health insurance.

Why this matters a lot: Many government benefits for multicultural families look at how long your foreign spouse has been listed at the same address with you, and this is often checked with the Resident Registration copy. For example, a multicultural-family special housing supply may require you to have lived at the same address as your spouse for at least 3 years (Incheon's program is one example). If your spouse was never added, those years may not count, and you could be left out of benefits. So do it as early as possible. Requirements differ by program and city, so always check the notice.

7. Tips

• Report the birth early. There is a deadline, and a late report can mean a small fine.
• Register your marriage in Korea first. Without it, the birth report gets complicated.
• Use the same name spelling on all documents. Name mismatches cause problems later.
• Ask to add your foreign spouse to the Resident Registration copy, as early as possible. It does not happen automatically, and the years listed together can matter for multicultural-family benefits.
• Do not worry about the "XX" digits. You will get the full number when you register in Korea.

Quick summary

1. A child with a Korean parent is Korean wherever they are born.
2. Report the birth through a Korean embassy or a Korean administrative agent (행정사).
3. Our case: about 7 days and about ₩400,000 using agents.
4. The ID number shows only 6 digits until the child registers as a resident in Korea.
5. Add your foreign spouse to the Resident Registration copy early. Some benefits, like special housing supply, can require 3 years listed at the same address.

This post is based on our experience and general rules. Procedures and documents can differ by country and case. Check with the Korean embassy or a licensed administrative agent for your situation.