Need a foreign document authenticated for use in Korea, or a family visit visa?

As cross-border transactions and study-abroad applications grow more common, Korean individuals and companies increasingly need to submit documents abroad — or submit foreign documents in Korea — in a form the receiving country's authorities will actually accept.

Why a plain translation isn't enough

A document written in a foreign language isn't recognized as authoritative just because it's been translated. To carry international legal weight, it generally has to go through two steps: (1) translation and notarization by a qualified professional, turning it into a certified public document, and then (2) apostille or consular legalization, depending on the destination country's own requirements.

Step 1: translation notarization

Anything that isn't already an original public document — a government-issued English resident registration copy, for example — but is instead a private document (a contract, articles of incorporation, a university diploma) needs translation notarization before it can receive an apostille or embassy certification. This is the legal step that certifies the translation matches the original exactly, giving a private document the public standing it needs for the next step.

Only a qualified translator can apply for translation notarization — a certified foreign-language translation administrative agent, a bachelor's-degree holder (or above) in the relevant field, a graduate of a university in the destination country, someone with a qualifying language-test score, or a certified translator/interpreter. Separately, a Translation Confirmation Certificate is a document a nationally certified foreign-language translation administrative agent issues on their own professional standing, certifying the translation matches the original — it carries legal effect for submission to government agencies. Translation notarization, by contrast, is a notary (attorney) formally witnessing the translator's oath as to accuracy. Which one a given recipient wants depends on their own requirements.

Step 2: apostille vs. consular legalization

Once translation notarization is complete, the document needs one more layer of authentication — apostille or consular legalization, depending on whether the destination country has joined the Hague Apostille Convention.

• Apostille (for Convention member countries — the US, UK, Australia, Japan, and 126+ others as of 2025): a single apostille sticker from Korea's Ministry of Justice or the Overseas Koreans Agency is immediately recognized as a valid public document abroad, skipping the full embassy-certification chain. Faster and cheaper.
• Consular legalization (for non-member countries — Thailand, for example, whose accession only takes effect on 2027-02-28): the destination country's embassy in Korea directly verifies the document's authenticity, through a three-stage chain — translation notarization → Overseas Koreans Agency (OKA) certification → the destination embassy/consulate's final confirmation. Slower and more expensive.

Which Korean authority issues the apostille depends on the document. An original public document issued by a government body or local authority — an English business registration certificate, for example — needs no notarization and goes straight to the Overseas Koreans Agency for its apostille. A document notarized at a notary office is a notarial document, and its apostille comes from the Ministry of Justice.

Documents we handle often

• ID and address proof for a foreign tax authority — when filing under a tax treaty, foreign tax authorities (India, for example) ask for proof of identity and address. A company proves its existence with an English business registration certificate or corporate registry extract, and its address with the English business registration certificate, a utility bill in the company's name, or an English bank statement; an individual uses a passport copy, a driver's license copy, or an English resident registration abstract. A private document such as a driver's license copy needs an English translation notarization and then a Ministry of Justice apostille to be recognized abroad.
• Power of attorney for an overseas agent — when you authorize a local agent to set up a foreign company, buy or sell property, invest in foreign shares, or file local taxes, the chain "draft the POA → notarization → apostille (or consular legalization)" is what makes the document legally valid with local authorities and banks. A POA written in English or Chinese is notarized as a private document with a Korean translation attached. One example: an English POA appointing a lawyer in India as agent, notarized and given a Ministry of Justice apostille before being sent there — India and China are both Apostille Convention members.
• Chinese-language POA to sell property in China — China joined the Apostille Convention in November 2023, so a notarized POA with a Ministry of Justice apostille is recognized by Chinese government offices. For a client selling an apartment in China in their own name through a relative there, we prepared a Korean translation so the Korean notary could follow the content, took the client's certificate of seal impression and the seal-stamped POA, had it notarized at a notary office acting as the client's agent, obtained the Ministry of Justice apostille, and shipped the finished document to the client.
• Basic Certificate, Family Relation Certificate, Marriage Relation Certificate — submitted to prove birth, identity, marriage and family ties for overseas permanent residency, international-marriage visas and similar. Some recipients require the detailed version, so the order is: (1) confirm which certificates and what level of detail are needed → (2) translate into the required language (checking translator credentials and format) → (3) notarize → (4) apostille or consular legalization.

Frequently asked

Can I translate and notarize an English or Chinese document myself? In principle, no — a notary can't verify translation accuracy on their own, so they'll decline without proof of the translator's qualifying credentials (a relevant foreign degree, a qualifying language score, or a certified translation-agent license).

A common case: a diploma for a US university submission. Since the US is an Apostille Convention member, the path is translate the Korean diploma into English, get it translation-notarized, then obtain a Ministry of Justice apostille — ready to submit directly to the US university.

Why bring in a licensed agent

We hold a US graduate degree and a certified Chinese-translation administrative-agent license, and handle English and Chinese translation, notarization, and apostille/consular filing as a single coordinated process — alongside C-3-1 short-term visa filing for inviting family, partners, or friends to Korea.