Marriage Nullity Lawsuit Lawyer
Marriage Nullity Lawsuit Lawyer | When a marriage was never legally valid
Under Korean law, a marriage nullity action (혼인무효) is a distinct claim from divorce: it argues that the marriage was void from the moment of registration because the parties never truly agreed to marry, or because it violates a prohibited-relationship rule (민법 제815조). If the court grants the claim, the marriage is treated as if it never legally existed, which affects property, the legitimacy of children, and inheritance rights differently from a divorce judgment. Because the legal consequences are severe and retroactive, courts require clear proof that genuine consent to marry was absent, not merely that the marriage later broke down.
Marriage Nullity Lawsuit | Nullity, Annulment for Cause, and Divorce Are Not the Same
Clients sometimes come in wanting a 'divorce' when what actually happened points to a marriage that was invalid from the start, or the reverse. Which claim applies changes the required proof, the time limit, and the outcome.
| Legal basis | 민법 제815조 |
| Time limit | None (can be raised any time) |
| Effect on marriage | Void from the start (ab initio) |
| Typical ground | No genuine intent to marry, prohibited relation |
A nullity judgment means the marriage registration is corrected as if the marriage never legally took effect (민법 제815조).
| Legal basis | 민법 제816조, 제823조 |
| Time limit | 3 months from discovering fraud or escaping duress (민법 제823조) |
| Effect on marriage | Valid until a court revokes it |
| Typical ground | Fraud, duress, concealment of serious disease |
Unlike nullity, annulment (혼인의 취소) treats the marriage as having existed until the court's revocation judgment (민법 제824조).
| Legal basis | 민법 제834조, 제840조 |
| Time limit | None for filing, but grounds may have their own limits |
| Effect on marriage | Ends a validly existing marriage |
| Typical ground | Adultery, abuse, irretrievable breakdown |
Divorce presumes the marriage was valid; the dispute is about ending it and dividing consequences (민법 제840조).
Marriage Nullity Lawsuit | When Korean Law Treats a Marriage as Void
Article 815 of the Civil Act lists the situations in which a marriage is void, not merely voidable. Courts read these grounds narrowly because declaring a marriage void erases its legal effect from the beginning.
If the parties never actually agreed to become husband and wife — for example, the marriage registration was filed without one party's real consent, or as a sham to obtain a visa or resident status — the marriage can be declared void. Courts examine whether the parties lived together, held a wedding, or intended a shared life, since a marriage registered purely for immigration or other collateral purposes without any intent to form a real marital relationship lacks genuine consent.
This item made void a marriage between blood relatives within the 8th degree, which Article 809(1) prohibits. The Constitutional Court held it incompatible with the Constitution (2022. 10. 27. 2018헌바115) and kept it in force only until 31 December 2024; because it was not amended by then, it lost effect on 1 January 2025, and such marriages are now challenged by annulment instead (민법 제816조 제1호).
A marriage is void where the parties are, or once were, related by affinity in the direct line, such as a father-in-law and daughter-in-law or a mother-in-law and son-in-law, even after the earlier marriage ended.
A marriage is also void where the parties were once lineal blood relatives through adoption, such as a former adoptive parent and adopted child, even after the adoption was dissolved.
What Nullity Does Not Cover
Nullity is not the right claim for a marriage that was validly formed but later fell apart due to infidelity, abuse, or personality conflicts — that is a divorce case (민법 제840조). It is also different from cases where consent was obtained through fraud or concealment of a serious illness, which fall under annulment for cause with its own 3-year time limit (민법 제823조).
Marriage Nullity Lawsuit | Proving There Was No Genuine Intent to Marry
The most litigated issue in nullity cases is not the wording of the statute but the evidence: how do you prove someone never really intended to be married? Courts look at the full picture of the parties' actual life together, or lack of it.
Sham marriages for immigration or residency status
When a marriage registration appears to have been made solely to obtain a visa, F-series residency, or nationality, without the parties ever cohabiting or presenting themselves as a couple, courts have treated this as lacking genuine marital intent and void under 민법 제815조 제1호. Evidence such as separate residences from day one, absence of a wedding ceremony, and lack of any shared finances or social recognition as a couple is central to this claim.
Marriage registered without one party's knowledge or true consent
In some cases, a marriage report is filed at the district office by one party alone, using the other person's documents, without that person ever agreeing to marry. Because 민법 제815조 제1호 requires an actual meeting of minds to marry, this type of registration can be nullified once discovered, and the affected party should also consider whether the registration itself involved forgery that could support a separate criminal complaint.
Distinguishing a troubled marriage from a nonexistent one
A marriage that started with real intent but quickly soured — for instance, the couple lived together briefly before separating — is generally not void; it is a valid marriage that may end in divorce. The key question courts ask is whether the parties intended, at the time of the marriage registration, to form an actual shared married life, not whether the marriage later succeeded.
Marriage Nullity Lawsuit | What Happens Legally Once a Marriage Is Declared Void
Because a nullity judgment treats the marriage as if it never took legal effect, its consequences differ sharply from a divorce judgment on several practical points that clients frequently ask about.
Children born during the void marriage
A child born to parents whose marriage is later declared void is deemed born out of wedlock (민법 제855조 제1항). If the father registered the birth, that registration has the effect of acknowledging paternity (가족관계등록법 제57조 제1항), so the father-child relationship itself continues. Parents should still confirm how the family register will be corrected and consult on custody and child support arrangements.
Property and de facto marital contributions
Because there was no valid marriage, the formal property division framework used in divorce (민법 제839조의2) does not directly apply; instead, contributions made during the relationship are typically resolved through unjust enrichment or quasi-contract theories, which require different proof than a divorce property division claim.
Correcting the family register and prior marital status
Once a nullity judgment becomes final, the parties can apply to correct the family register to remove the marriage record, which matters for anyone who wants to remarry or needs an accurate marital history for immigration, inheritance, or other legal purposes.
Marriage Nullity Lawsuit | From Consultation to Final Judgment
The attorney reviews the marriage registration date, any cohabitation history, immigration or visa records, and communications to assess whether the facts fit a nullity claim rather than divorce or annulment for cause.
Unlike divorce, a nullity action is a Category Ga (가류) family lawsuit, so it does not go through the Family Court's mandatory mediation stage and proceeds directly to litigation (가사소송법 제2조, 제50조). Because the parties cannot settle whether a marriage is void, the case turns on evidence from the outset.
The complaint sets out the specific ground under 민법 제815조 and attaches supporting evidence such as residency records, absence of a wedding, or documentation showing the registration was made without genuine consent.
The court examines witness testimony, cohabitation records, immigration data, and other objective evidence, since nullity requires proof beyond simple allegations of a failed relationship.
If the court grants the claim, the judgment becomes final after the appeal period runs, and the parties file to correct the family register to reflect that the marriage never had legal effect.
Marriage Nullity Lawsuit | How Fees Are Typically Set for a Nullity Case
Usually set based on case complexity, particularly how much investigation is needed to prove absence of genuine marital intent, and whether the case is contested or unopposed by the other party.
If used, this is typically tied to whether the nullity judgment is granted, and may also depend on any related property or unjust-enrichment claims resolved alongside it.
Includes the court filing fee calculated on the nature of the claim, stamp fees, and service-of-process costs, which are separate from attorney fees.
Cases involving immigration records, cohabitation history, or overseas evidence may require additional costs for document collection, translation, or investigation.
The nullity action itself skips mediation, but if a damages (consolation money) or property claim is filed alongside it, fees and costs for that additional claim may be set separately.
※ Costs vary depending on case complexity and specific circumstances; exact fees will be provided during consultation. No specific outcome is guaranteed.
Marriage Nullity Lawsuit | Self-Check Before You File
1️⃣ Is Nullity the Right Claim for You?
- Did you and your spouse ever actually live together or present yourselves publicly as a married couple?
- Was the marriage registered for a purpose other than forming an actual marital relationship, such as a visa or residency status?
- Were you unaware that a marriage registration had been filed using your information?
- Is there a blood or in-law relationship between you and your spouse that might fall within a prohibited degree under 민법 제815조?
2️⃣ Evidence You Should Start Gathering
- Do you have records showing separate residences from the date of marriage registration (utility bills, lease contracts)?
- Are there immigration, visa, or residency application records connected to the marriage?
- Do you have communications (texts, messages) discussing the marriage as one of convenience?
- Can you identify witnesses who can testify about the lack of a wedding ceremony or shared life?
3️⃣ If You Are the One Being Sued for Nullity
- Do you have evidence of cohabitation, a wedding ceremony, or joint finances that shows a genuine marriage?
- Could the claim actually be time-barred or better characterized as an annulment-for-cause or divorce case instead?
- Have you considered how a nullity judgment would affect any children or shared property?
