A parent in California puts together everything she believes proves her case: school reports, a pediatrician’s letter, three signed statements from friends who watched the marriage fall apart, and screenshots of two years of messages. She sends the file to Korea for a custody dispute in a Korean family court. Months later she learns that most of it was never weighed at all.
Nothing in that file was fabricated. The problem was structural. Korean civil procedure sorts documents into categories before it ever considers what they say, and a document made outside Korea usually lands in the category that carries no presumption in its favour. Understanding that sorting step — before anything is sent — changes what a case looks like.
What this article covers
How a Korean court classifies a document created abroad, why private documents carry no automatic presumption of authenticity, what the translation requirement does when it is not met, and why testimony located overseas travels through a diplomatic channel rather than a courier.
It does not cover how to assemble or prepare evidence for a particular case. That depends on the dispute.
The first division: who wrote it
Korean law does not begin by asking whether a document is true. It begins by asking who created it — a public authority, or a private person.
Article 356 of the Civil Procedure Act (민사소송법) gives public documents a presumption. Where the form and purport of a document show it was drawn up by a public official in the course of duty, it is presumed to be a genuine public document. Article 356(3) extends that same presumption to documents recognised as having been drawn up by a foreign public authority. A birth record from a foreign civil registry, a judgment from a foreign court, a certificate from a foreign government office — these enter the Korean file with the presumption already attached.
Article 357 states the opposite rule for everything else, in a single sentence: a private document must be proven to be genuine (사문서는 그것이 진정한 것임을 증명하여야 한다). There is no presumption. The party who submits it carries the burden of establishing that it is what it claims to be.
That single sentence is where most foreign evidence files run into trouble. A letter from a doctor, a statement signed by a friend, a letter from an employer, a printed message thread, a declaration signed before a notary abroad — all of these are private documents. The notary’s seal may make the signature easier to establish, but it does not convert the underlying statement into a public document.
| Document created abroad | Category in Korean procedure | Starting position |
|---|---|---|
| Foreign court judgment, civil registry extract, government-issued certificate | Foreign public document — Art. 356(3) | Presumed genuine |
| Signed statement or declaration by a relative, friend, or colleague | Private document — Art. 357 | No presumption; authenticity must be proven |
| Letter from a doctor, school, therapist, or employer | Private document — Art. 357 | No presumption; authenticity must be proven |
| Contract, agreement, or acknowledgment signed between the parties | Private document — Art. 357, with Art. 358 in play | No presumption unless a signature or seal is established |
| Printouts of messages, emails, or social media | Private document — Art. 357 | No presumption; authorship and date frequently contested |
The distinction has a practical edge for foreign parties. Documents obtained from a foreign government often travel well into a Korean case. Documents produced by people — which is what most of a family dispute consists of — do not travel on their own.
What a signature does, and how far it goes
Article 358 supplies the one presumption available to private documents: where a document bears the signature, seal, or thumbprint of the person or their agent, it is presumed genuine. The Supreme Court has explained what that presumption reaches and how firmly it holds.
The account below reconstructs a reported Supreme Court decision to illustrate how the rule operates. Names, sums, and circumstances are taken from the published judgment, not from any client matter.
A lender had transferred a little over 41 million won to a business owner across the first four months of 2010. What she later brought to court was a single sheet headed “지불각서” — an acknowledgment of payment. The top of the page recorded an undertaking to pay the sum by 21 May 2010. The bottom carried a handwritten address and the words “각서인” followed by the defendant’s name, and beside it two impressions: the company’s seal and his own.
He did not deny writing the bottom. His position was narrower and, in litigation, a familiar one: he said he had signed a blank sheet, and that the lender had filled in the rest afterwards and applied the seals herself. An expert appointed by the appellate court compared the handwriting at the foot of the page with his own and found them the same.
The Supreme Court, dismissing his appeal on 30 September 2021, set out the chain the lower court had been entitled to follow:
“Where it is recognised that the person named as the author of a private document signed, sealed, or thumb-printed it — that is, where the genuineness of the seal impression and the like is recognised — the genuineness of the document as a whole is presumed, absent special circumstances such as the presumption being overturned by counter-evidence; and if the genuineness of the seal impression and the like is recognised, it may be presumed, absent special circumstances, that the person named as author affixed that signature, seal, or thumbprint while the document was in a completed state. Circumstances such as a signature and seal having been affixed first while the whole or part of the document remained incomplete are exceptional, and to overturn the presumption of genuineness as a completed document, a reasonable ground for so finding and evidence such as indirect counter-evidence supporting it are required.”
Supreme Court of Korea, 30 September 2021, 2019Da245457 (대법원 2019다245457, 대여금) — appeal dismissed. Referring to 2003Da29254 and 2001Da11406.
Two things follow that matter well beyond that dispute. First, once a signature or seal is established, the presumption covers the whole document, not merely the signature line. Second, the way back out is narrow: the court described the “signed a blank page” scenario as exceptional, requiring both a coherent explanation and supporting indirect evidence.
Read from the other direction — the direction that matters when the document was made abroad — the same passage explains the exposure. The presumption is triggered by establishing the signature or seal. Where the signatory is overseas, is not a party, and may have no reason to involve themselves further, establishing that first step is not a formality. It is the whole question.
The language requirement, and what happens when it is not met
A Korean court works in Korean. Rule 106(2) of the Rules of Civil Procedure (민사소송규칙, in force 1 March 2026) requires that where documentary evidence is written in characters or symbols other than Korean, a translation must be attached; where only part of a document is offered in evidence, the presiding judge may permit a translation of that part alone.
That requirement has teeth. Rule 109 lists the grounds on which a court may decline to admit documentary evidence, or revoke a decision already admitting it:
| Rule 109 | Ground for refusing or revoking admission of documentary evidence |
|---|---|
| Item 1 | No relevance is established between the document and the fact to be proven |
| Item 2 | The document is the same as, or to similar effect as, evidence already submitted, and the party has not shown it carries separate evidentiary value |
| Item 3 | The document is in characters or symbols other than Korean and no translation is attached, or the presiding judge’s order to submit a translation is not complied with |
| Item 4 | The presiding judge’s order under Rule 106(1) to submit an explanatory statement of evidence is not complied with |
| Item 5 | The author or the date of creation of the document is unclear, and the presiding judge’s order to clarify is not complied with |
Item 5 deserves a second reading alongside Rule 105(1), which requires a party submitting a document to identify its title, its author, and the date it was made, unless these are evident on the face of the document. Foreign material frequently arrives without one of the three. An undated letter of support. A printed message thread with no identified account holder. A photograph of a page whose origin is not apparent. Each of those can be met with an order to clarify — and non-compliance is a listed ground for the document to drop out of the case.
There is a further formality that surprises parties used to filing scans. Article 355(1) provides that a document submitted or sent to the court must be an original, an authenticated copy (정본), or a certified transcript (인증이 있는 등본), and Article 355(2) allows the court to order production of the original. A photograph of a document sitting on a kitchen table in another country is not, on its own, any of those three.
Evidence that is not a document: people, and where they are
Documents are only half of a contested family case. The other half is testimony — and here the geography stops being an inconvenience and becomes a procedural route.
Article 296(1) of the Civil Procedure Act provides that an examination of evidence to be conducted in a foreign country is entrusted (촉탁) to the Korean ambassador, minister, or consul resident in that country, or to the competent public authority of that country. Article 296(2) adds a useful piece of tolerance: evidence taken abroad is effective so long as it does not contravene Korean law, even if it contravenes the law of the country where it was taken.
The route that entrustment takes is set by the Act on International Judicial Mutual Assistance in Civil Matters (국제민사사법공조법). Article 5(1) provides that entrustment to a foreign country is made by the presiding judge of the court seised, to the competent court or public office of that country. Article 5(2)(1) allows entrustment to the Korean embassy, legation, or consulate instead where the person to be served or examined is a Korean national residing in a State party to the Vienna Convention on Consular Relations, provided this does not contravene that country’s law or expressed position.
Article 6 then sets out the path the papers physically take: the head of the court to which the requesting judge belongs asks the Director of the National Court Administration to forward the request and related documents; the Director in turn asks the Minister of Foreign Affairs to send them, through diplomatic channels, to the receiving authority under Article 5.
Three offices and a diplomatic channel. That structure explains something parties often experience without a name for it: why a witness who is willing, contactable, and eager to help can still take a long time to reach the record, and why a court’s willingness to hear that witness is not the same thing as the witness being heard. The related question of getting the court’s own papers out to a party abroad follows a parallel logic, which we cover in international service of process in a Korean divorce.
Where a person does appear and does not speak Korean, Article 143(1) requires that an interpreter be used for anyone taking part in oral argument who cannot speak Korean or has a hearing or speech impairment; Article 143(2) applies the Act’s provisions on expert witnesses to interpreters. Interpretation, in other words, is not an informal accommodation arranged between the parties. It is a formal role.
Family cases: the court is not a passive recipient
Everything above comes from the Civil Procedure Act and its Rules. Article 12 of the Family Litigation Act (가사소송법) makes them applicable to family litigation except where that Act provides otherwise, while disapplying a specific list of civil provisions for Type A (가류) and Type B (나류) family actions — among them the rules on admission of claims and on the binding effect of a party’s admissions of fact.
The reason for those exclusions appears in Article 17. When a family court hears a Type A or Type B family action, it must investigate the facts and take the necessary evidence on its own initiative, and it may question the parties or their legal representatives at any time. Divorce actions, actions concerning parental authority and custody arising in that context, and actions on the validity of a marriage sit inside this framework.
This cuts both ways for a foreign party, and it is worth being clear about both directions. The court is not confined to what the parties choose to hand up, which can help a party whose documentary position is thin through no fault of their own. But it also means the court forms its own view of the reliability of what is submitted, and a party’s agreement with the other side about a fact does not settle it. Documents that would pass unchallenged in a system built on party agreement can be examined here.
The custody dimension of this — what a Korean court actually weighs when deciding where a child lives — is set out separately in child custody in Korea for foreign parents.
Where the apostille fits, and where it stops
Apostille certification and consular legalisation are frequently described to foreign parties as the step that makes documents “valid in Korea.” That description is too generous.
Certification addresses provenance: it authenticates the signature or seal of the official or notary who certified the document, so that a Korean court can recognise the document as having come from where it claims. For a document from a foreign public authority, that is often the last mile — Article 356(3) then does the rest.
For a private document, certification does something narrower. It supports the step Article 358 needs: establishing that the named person really signed. It does not touch the content. A notarised declaration remains a written statement by a person who has not been questioned, evaluated by the court under its free assessment of the evidence like any other private document. The certification of documents executed abroad, including the two available certification tracks and their effect on a litigation mandate, is covered in power of attorney for Korean litigation from abroad.
Key points
1. Documents from a foreign public authority carry a presumption of genuineness under Article 356(3). Private documents carry none — Article 357 places the burden of proving authenticity on the party submitting them.
2. Article 358 gives a presumption once a signature, seal, or thumbprint is established, and 2019Da245457 confirms it extends to the whole document and is difficult to rebut. Establishing that first step is harder when the signatory is overseas.
3. Rule 106(2) requires a Korean translation of foreign-language documentary evidence; Rule 109 item 3 lets the court refuse or revoke admission where it is missing.
4. Rule 109 item 5 and Rule 105(1) mean an unclear author or date can cost a document its place in the file. Article 355(1) requires an original or a properly authenticated copy.
5. Evidence taken abroad runs through Article 296 and the diplomatic channel in Articles 5 and 6 of the Act on International Judicial Mutual Assistance in Civil Matters — court, National Court Administration, Ministry of Foreign Affairs.
6. In Type A and Type B family actions, Article 17 of the Family Litigation Act requires the court to investigate facts and take evidence on its own initiative.
What this means before anything is sent
The rules above are public. What they do not settle is the question that actually decides a case: given this dispute, this opponent, and this set of material scattered across two countries, what belongs in the file and in what form. That assessment is not a checklist, and it is not the same from case to case — which is why it is the part that has to be done with a lawyer looking at the specific documents rather than at a general description of them.
Two expectations are worth adjusting early. Volume is not strength: a file of eighty exhibits with unclear authorship can carry less weight than four whose provenance is settled. And time spent abroad is real time — the entrustment route in Article 296 has no shortcut, and building a case around a witness who has to travel that route is a different plan from building one around documents already in a form the court can receive.
For the wider framework of how a Korean court takes jurisdiction over an international marriage and what it decides, see our international divorce in Korea guide.
Frequently asked questions
Does a notarised statement from abroad count as evidence in a Korean court?
It can be submitted, and it is evidence in the sense that the court may consider it. But it remains a private document under Article 357 of the Civil Procedure Act, so its authenticity has to be proven rather than presumed. Notarisation mainly assists with establishing the signature, which is what Article 358 requires; it does not verify the content, and it does not put the statement on the same footing as testimony given before the court.
Do I have to translate every document into Korean?
Rule 106(2) of the Rules of Civil Procedure requires a translation to be attached to documentary evidence written in characters or symbols other than Korean. Where only part of a document is relied on, the presiding judge may permit a translation of that part alone. Rule 109 item 3 allows the court to refuse to admit the document, or revoke an earlier decision admitting it, where no translation is attached or an order to submit one is not complied with.
Can a witness who lives abroad give evidence in a Korean case?
Yes, but not by private arrangement. Article 296(1) of the Civil Procedure Act provides that an examination of evidence to be carried out in a foreign country is entrusted to the Korean ambassador, minister, or consul in that country, or to that country’s competent public authority. Articles 5 and 6 of the Act on International Judicial Mutual Assistance in Civil Matters route the request through the court, the National Court Administration, and the Ministry of Foreign Affairs via diplomatic channels. Article 296(2) provides that evidence so taken is effective if it does not contravene Korean law, even where it contravenes the law of the country in which it was taken.
Is a screenshot of messages accepted as evidence in Korea?
There is no rule excluding it, but it faces the ordinary obstacles for private documents. Its authenticity must be proven under Article 357, and Rule 109 item 5 allows the court to refuse admission where the author or date is unclear and an order to clarify is not complied with. Article 355(1) also requires submission of an original or a properly authenticated copy, and the court may order production of the original under Article 355(2).
Does an apostille make my foreign document valid in a Korean court?
Not by itself, and the effect differs by document type. For a document issued by a foreign public authority, certification supports recognition and Article 356(3) then supplies a presumption of genuineness. For a private document, certification helps establish that the named person signed — the step Article 358 turns on — but leaves the content to be assessed by the court like any other private document.
Will a Korean family court look for evidence on its own?
In Type A (가류) and Type B (나류) family actions, yes. Article 17 of the Family Litigation Act requires the family court to investigate the facts and take the necessary evidence on its own initiative, and permits it to question the parties or their legal representatives at any time. Article 12 of the same Act also disapplies certain civil provisions for those cases, including those on admission of claims and the binding effect of admissions of fact.
Talking to us about a case with documents in two countries
If a Korean family or civil case involves material created outside Korea, the useful first conversation is about what exists and where it came from — who created each document, when, and whether it originated with a public authority or a private person. That is enough to see which parts of a file will travel and which will not.
We work in English with clients in the United States, Australia, the Philippines, and elsewhere, and we are used to matters where the client never sets foot in a Korean courtroom.
Reach us on KakaoTalk to arrange a consultation.
We do not publish a fee schedule. The work required varies too widely between cases — a matter resting on two certified public records and a matter requiring evidence taken abroad are not comparable in scope — so a figure is only meaningful once we understand what the case actually involves.
This article explains provisions of Korean law in general terms and is not legal advice for any particular case. Statutes and rules cited were verified against the Korean Ministry of Government Legislation database as of September 2026. Yeohae Law Office, 16 Beopwon-ro, Seocho-gu, Seoul, Room 406 (Seocho-dong, Jeonggok Building).
