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Foreign companies signing contracts with a Korean counterparty often treat the paperwork the same way they would at home: get a signature from someone who sounds senior, file the signed PDF, move on. Korean commercial practice runs on a different foundation. The primary mark of corporate authority on a Korean contract has traditionally been a registered seal, not a signature, and the two documents that establish whether a given seal impression actually binds the company — the corporate registration certificate and the corporate seal certificate — are checked far less consistently by foreign counterparties than they should be. Skipping that check is how a company ends up with a signed contract that a Korean court later finds was never properly authorized.

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Why Korea’s Seal System Matters to a Foreign Counterparty

The Registered Seal as the Primary Mark of Corporate Authority

A Korean company registers a specific seal impression with the corporate registry, and that registered seal — not an individual’s signature — has traditionally been the evidentiary anchor for whether a document was executed with the company’s authority. A 2014 amendment to the Commercial Registration Act introduced an alternative allowing a representative director to register a signature instead of a seal, but seal-based execution remains the dominant practice for contracts, real estate transactions, and financial dealings. A foreign counterparty unfamiliar with this system can easily miss that the stamp on a contract, not the name typed below it, is what actually needs verifying.

Registered Seal vs. “Usage Seal”

Korean companies commonly operate two tiers of seal. The registered corporate seal is reserved for major or legally significant documents and is the one certified by the corporate seal certificate. Day-to-day business is often conducted with a separate “usage seal” for routine documents, and that usage seal is itself authorized through a usage seal registration form — a document that carries an impression of the registered corporate seal to certify that the usage seal is legitimate. A contract stamped only with a usage seal, with no accompanying usage seal registration on file, has a materially weaker claim to being validly executed than one bearing the registered seal directly.

Checking the Corporate Registration Certificate

How to Obtain It

The corporate registration certificate is public information. It can be pulled in real time, for a small fee, through the Supreme Court’s Internet Registry Office, at unmanned issuance kiosks, or at any registry office counter — without needing the counterparty’s cooperation or even notifying them.

What to Verify on the Certificate

The certificate should be checked against the deal documents for more than just a name match. Confirm the registered corporate name and corporate registration number match exactly what appears on the contract and any business materials. Identify the currently registered representative director and confirm that person is actually who is signing — and check whether the company has joint representative directors registered, since if joint representation is on file, a contract signed by only one of them is not binding on the company. Review the registered business purpose to confirm the transaction actually falls within what the company is registered to do. And check the history section for recent changes — a representative director change that happened last month may not yet be reflected on business cards or email signatures the counterparty is still using. Watch specifically for entries showing dissolution, liquidation, court-supervised rehabilitation, or bankruptcy — any of these materially changes who actually has authority to bind the company, and standard operational contact points at the company may not volunteer this information.

Confirm the Certificate Is Current

Because the registry reflects changes as they’re filed, a certificate pulled months earlier can already be stale by the time of signing. The safer practice is pulling a fresh certificate shortly before execution, not relying on a copy collected earlier in the negotiation.

Checking the Corporate Seal Certificate

How It Differs From the Registration Certificate

Unlike the registration certificate, the corporate seal certificate is not freely public — it can generally only be requested by the company itself, through its representative director or someone holding a power of attorney to do so, precisely because it’s meant to authenticate who currently controls signing authority for sensitive matters. In practice, this means a foreign counterparty typically cannot pull this document independently the way it can the registration certificate; instead, it should be requested as a standard part of deal documentation from the Korean company itself. A certificate that is months or years old is a weaker basis for reliance than a recently issued one — deal practice commonly expects a certificate issued within a few months of signing, even though there’s no fixed statutory shelf life.

What to Compare

Two comparisons matter here: the representative director’s name on the seal certificate should match the name currently registered on the corporate registration certificate, and the seal impression shown on the certificate should be visually compared against the actual impression stamped on the signed contract page. A mismatch on either point is a reason to stop and ask questions before proceeding.

When Someone Other Than the Representative Director Signs

Where a contract is signed by someone other than the registered representative director — a managing director, division head, or other officer, using a usage seal — the counterparty should be asked to provide the power of attorney defining the scope of that person’s delegated authority, along with the usage seal registration form bearing the registered corporate seal’s impression. Without these, a signature by someone who turns out to have lacked actual authority can leave the contract’s enforceability against the company in question.

Electronic Alternatives Are Emerging, but Seal Practice Still Dominates

Korea has been building out electronic alternatives — electronic corporate certificates, electronic identity verification tools, and expanded online registry-linked authentication for certain filings — that reduce reliance on a physical seal for some transactions. These are worth being aware of, but for most commercial contracts as of today, the physical registered seal and its accompanying certificate remain the default standard a counterparty should expect to verify.

A Practical Checklist Before Signing

Before executing a material contract with a Korean company, it’s worth pulling a fresh corporate registration certificate through the Internet Registry Office close to the signing date; confirming the registered representative director (or directors, if joint representation applies) and comparing that to who is actually signing; checking for dissolution, bankruptcy, or rehabilitation entries; requesting a recently issued corporate seal certificate directly from the counterparty; comparing the seal impression on that certificate against the impression on the signed document itself; and, where a proxy is signing, collecting both the power of attorney and the usage seal registration form. Keeping copies of all of these alongside the signed contract is worth doing as a matter of course — they’re often exactly what becomes relevant if the counterparty’s authority to sign is disputed later.

This is general information about how Korean corporate seal and registration verification works, not a review of any specific counterparty or transaction — the right level of diligence depends on the deal’s size and risk, and unusual entries on either document are worth raising with Korean counsel before proceeding rather than after signing.