The Nationality Act of the Republic of Korea stipulates that a person whose father or mother is a national of the Republic of Korea at the time of the person's birth shall acquire the nationality of the Republic of Korea at birth (Article 2 of the Nationality Act).
For a child to acquire Korean nationality at birth on the grounds of the father being a Korean national, a legal parent-child relationship must be recognized between the father and the child, not just a biological one.
Even if a genetic test confirms a biological relationship between a father and a child born out of wedlock, a legal parent-child relationship is not established without legal recognition (인지, inji).
Therefore, a child born out of wedlock between a Korean father and a foreign mother cannot acquire Korean nationality until the Korean father legally recognizes the child, or until a court's final judgment on a claim for affiliation is obtained against the father, and the subsequent report for nationality acquisition is completed.
Legal recognition (인지, inji) is the act by which a father legally acknowledges his biological child, thereby establishing a legal parent-child relationship.
When a father recognizes a child, he gains rights to visitation and bears the responsibility for child-rearing. The child will be recorded on the father's Basic Certificate and Family Relations Certificate (Detailed).
A child born to a married couple is legally presumed to be the father's child, regardless of the mother's nationality, so legal recognition is not necessary.
Recognition can be accomplished through a voluntary report by the father (voluntary recognition) if he is cooperative, or through a lawsuit claiming affiliation (judicial recognition) if he is not.
Even if the father files a birth registration for a child born out of wedlock instead of a recognition report, this registration has the effect of legal recognition (Article 57 of the Act on the Registration, etc. of Family Relationships).
If the foreign mother is married to another man or recently divorced, and the child is legally presumed to be that man's child, a report of recognition or a lawsuit for affiliation cannot be filed. A lawsuit to deny paternity must be initiated first.
Without careful attention, even if legal recognition is successful, many problems can arise in the future processes of the child's nationality acquisition and upbringing.
Based on extensive experience with various related cases, YEOHAE LAW FIRM provides legal safeguards to ensure that you do not have to go through further litigation during the child's nationality acquisition and subsequent upbringing.
| Case | Method | Procedure |
|---|---|---|
| When the Father is Cooperative |
Voluntary Recognition (Voluntary Report) |
Report of Recognition: The father submits a Report of Recognition to the local city (Gu), town (Eup), or township (Myeon) office to establish a legal father-child relationship. |
| When the Father is Uncooperative |
Judicial Recognition (Lawsuit for Affiliation) |
1. Filing a Lawsuit: The child or their legal representative (mother) files a "Claim for Affiliation" against the father in the Family Court. 2. Evidence Investigation: The parent-child relationship is proven through a DNA test as ordered by the court. 3. Final Judgment: The court issues a ruling that acknowledges the parent-child relationship. 4. Report of Recognition by Judgment: The person who filed the lawsuit must submit a report of recognition to the local city (Gu), town (Eup), or township (Myeon) office within one month from the date the judgment becomes final, attaching a certified copy of the judgment and a certificate of finality. |
A minor who is not a national of the Republic of Korea but has been legally recognized by their father, who was a national of the Republic of Korea at the time of the child's birth, can acquire Korean nationality by reporting the acquisition of nationality through recognition to the Minister of Justice.
Even after establishing a legal parent-child relationship with the Korean father through recognition, the child must go through the procedure of reporting the acquisition of nationality at an Immigration Office to obtain Korean nationality.
It is important to note that even if the recognition process is completed successfully, it may be impossible to prepare the necessary documents for the nationality acquisition report without the father's cooperation.
YEOHAE LAW FIRM has a diverse portfolio of successful cases in acquiring nationality for children, even in various special circumstances, such as when the foreign mother is an undocumented resident or when the father is uncooperative.
If the foreign mother is legally or de facto married to the Korean father of the child, she may be able to obtain a Marriage Migrant Visa (F-6).
However, if the Korean father is already married to someone else or has no intention of marrying the foreign mother, obtaining a Marriage Migrant Visa is not possible.
In this case, the requirements for the foreign mother to obtain a visa are strict, requiring special attention.
YEOHAE LAW FIRM has many successful cases of obtaining visas for unmarried foreign mothers (including undocumented residents).
A Korean father who has legally recognized his child bears the responsibility for the child's upbringing.
If the foreign mother is raising the child but is not receiving child support from the father, she can be awarded child support payments through a child support claim lawsuit.
The foreign mother's legal residency status is irrelevant to a child support claim lawsuit.
Child support can be claimed not only for future monthly payments but also for past expenses.
The Republic of Korea has established various means of enforcing child support payments, as shown in the table below.
| Enforcement Measure | Description | Requirement | Effective When |
|---|---|---|---|
| Direct Payment Order | The court orders the father's employer to withhold child support from his salary and pay it directly to the mother. | The father is a salaried employee and has failed to pay child support on two or more occasions without a valid reason. | The father has a stable job. |
| Compulsory Execution (Asset Seizure) | Assets in the father's name, such as bank deposits, real estate, or vehicles, are seized and forcibly sold to cover the child support. | A legal basis for execution (e.g., a court judgment, mediation agreement) has been secured. | The father is self-employed or possesses assets other than his salary. |
| Detention Order | A final measure of pressure where the court orders the father to be detained in a facility, such as a detention center, for up to 30 days for non-payment of child support. | Can be requested if the father fails to comply with a court's performance order. | The father is concealing assets or willfully refusing to pay despite having the ability to do so. |
| Other Administrative Sanctions | Sanctions such as suspension of driver's license, travel ban, and public disclosure of identity are imposed. | Can be applied in stages if the father continues to not pay child support even after a detention order. | The goal is to apply maximum social and administrative pressure. |
A: Some places with insufficient experience in these matters may advise you to file a birth registration at a community service center for a child born out of wedlock to a foreign mother and a Korean father. However, the Act on the Registration, etc. of Family Relationships applies to the registration of family relations events, such as the birth of Korean nationals. A child who is still a foreign national and has not completed the legal recognition and nationality acquisition procedures cannot be registered under the Family Relationship Registration Act. For this reason, the community service center cannot accept the birth registration and will reject it.
A: It largely depends on the father's cooperation. If the father actively cooperates in all procedures, it can be finalized within a few months. However, if the father is uncooperative and a "Claim for Affiliation" lawsuit is necessary, it could take a year or more due to court proceedings. YEOHAE LAW FIRM proceeds with each case in the most expeditious manner according to the situation.
A: Yes, it is possible. The mother's residency status and the child's nationality acquisition are treated as separate issues. Of course, the mother's residency issues (such as paying fines, departing and re-entering the country) must also be addressed, but this should not prevent you from starting the process of securing your child's rights. YEOHAE LAW FIRM can help you navigate both issues simultaneously to achieve the most favorable outcome.
A: This requires legal action by an attorney. YEOHAE LAW FIRM can file a "Claim for Affiliation" lawsuit against the father in court. Through the court, we can proceed with a DNA test and forcibly establish a legal parent-child relationship through a judgment. In the Republic of Korea, only lawyers are authorized to represent clients in such legal proceedings; administrative agents or other general agencies cannot. There are cases of non-lawyers improperly using the title "Attorney" when dealing with foreign clients, so be sure to verify that you are working with a lawyer registered with the Korean Bar Association or a legitimate law firm.
A: Yes, we can handle cases in courts nationwide. You do not need to visit our office; you can have a consultation via KakaoTalk or phone and then send us the necessary documents.
A: The most important and urgent first step is to understand the overall plan and sequence of procedures that fit your specific situation through an accurate legal consultation. Relying on incorrect information and visiting government offices without a plan can lead to wasted time and psychological distress from rejection. Take the safest and most certain first step by consulting with YEOHAE LAW FIRM.
A. Our staff can provide consultations in English, Vietnamese, and Russian. For Chinese, Japanese, Thai, and other languages, consultations are available by prior appointment.

YEOHAE LAWFIRM (Managing Partner Kim, Pyong-ho) has been honored with the Excellent Lawyer Award by the Korean Bar Association for exemplary advocacy and professional excellence.