Korea Corporate Seal & Certificate of Seal Impression (Ingam) Guide 2026

Table of Contents

Why the Corporate Seal Still Matters in Korea

Korea is famously digital in many areas, yet the corporate seal (법인인감) remains a core legal and commercial instrument. Most banks, landlords, and counterparties still expect a company seal imprint—often accompanied by a Certificate of Seal Impression (법인인감증명서)—before they accept a contract or open an account. For foreign founders, this requirement can feel archaic, but in practice it is a gatekeeper for transactions.

The seal functions as a company’s official identity. It signals that the act is binding on the company and not just an individual employee. Even when electronic signatures are technically valid, counterparties still ask for a seal because it reduces their risk in a country where the seal is a long-established custom.

If you plan to incorporate in Korea, open a corporate bank account, lease office space, or execute material contracts, you should treat the seal as a non‑negotiable compliance step.

Key Terms: Seal, Seal Card, and Seal Certificate

A Korean company will typically deal with three items:

• Corporate Seal (법인인감): The official stamp for the company. It is registered and held by the company.
• Seal Card (법인인감카드): A card used to issue the seal certificate at the district office (or through authorized channels). It functions like a key to request certificates.
• Certificate of Seal Impression (법인인감증명서): A government-issued certificate verifying the seal imprint and the company’s registration details. Banks and counterparties often require a certificate issued within the last 3 months.

Think of the seal as the “signature,” and the certificate as proof that the signature is genuine and current.

When You Must Use the Corporate Seal

In practice, you should expect to use the seal for the following:

1. Corporate bank account opening and major banking changes
2. Office leases and real estate transactions
3. Major contracts (distribution, manufacturing, IP licensing)
4. Government filings or applications requiring a formal stamp
5. Power of attorney and notarized actions

Some counterparties accept a signed contract without a seal, but many still insist on seal + certificate. If you refuse, you risk delays or rejection.

Typical Request Pattern

Types of Seals You May Encounter

Foreign founders often see multiple stamps and assume they are interchangeable. They are not.

• Corporate Seal (법인인감): The official registered seal. Use for binding acts.
• Bank Seal (은행용 인감): Some banks request a separate seal for banking transactions.
• Name Stamp / Signature Stamp (명판): Often used for internal documents or invoices. It is not the official corporate seal.

If you present the wrong seal, the counterparty may reject the document or ask for re‑issuance of the seal certificate.

How Banks Verify the Seal

Banks typically request:

• A recent certificate of seal impression
• The corporate registration certificate
• Identification of the representative director

The bank will compare the seal imprint on account opening forms with the certificate. If there is any mismatch, the process stops. This is why seal integrity and consistency are critical.

What If the Seal Is Lost or Misused?

A lost or compromised seal is a serious corporate risk. You should:

1. Immediately report the loss internally
2. Re‑register a new seal at the district office
3. Notify banks and key counterparties
4. Consider revoking existing powers of attorney

Delays in reporting can expose the company to unauthorized transactions.

How to Register the Corporate Seal (Ingam)

Registration is handled at the competent district office after incorporation, typically following the issuance of the corporate registration certificate.

General steps:

1. Create the corporate seal (custom seal shop or specialized vendor).
2. Prepare corporate documents, including the corporate registry certificate and representative director’s ID.
3. Visit the district office (or authorized service) to register the seal.
4. Receive the seal card for future issuance of certificates.

The representative director usually must appear, though in practice, power of attorney may be accepted in limited cases with proper notarization and apostille.

Timing

Register the seal as soon as incorporation is completed. If you delay, you may not be able to open a bank account or sign essential contracts.

Issuing a Certificate of Seal Impression

Once the seal is registered, you can issue certificates as needed. Many counterparties require a certificate that is issued within the last 3 months (sometimes within 1 month).

Typical process:

• Use the seal card at the district office or authorized kiosk.
• Request multiple copies at once (banks often require originals).
• Keep a log of when certificates were issued and for what purpose.

Certificate Validity in Practice

Legally, the certificate does not “expire,” but counterparties often refuse old certificates. As a rule:

• 1–3 months old is usually acceptable
• Over 3 months often rejected for banking and real estate

Foreign Founders: Practical Challenges and Workarounds

Foreign founders face three common challenges:

1) Physical presence requirements

Most district offices expect the representative director or an authorized delegate to appear. If the director is abroad, plan for:

• Power of attorney (apostilled/legalized)
• Korean translation where required
• Local support to handle submission

2) Banking demands beyond the seal

Banks may require additional documents beyond the seal certificate, such as:

• Proof of office lease
• Business plan / transaction purpose
• Identification of ultimate beneficial owner

3) Confusion between seals

Some foreign founders confuse the corporate seal with a name stamp (도장) used internally. The corporate seal must be the official registered seal, not a generic stamp.

Corporate Seal vs. Signature: What Actually Prevails?

Legally, a contract can be valid without a seal if it is properly executed. However, in Korea the seal is the default compliance signal. Counterparties and institutions tend to treat a seal as stronger evidence than a signature alone.

For risk management, most Korean counterparties will ask for:

• Contract + corporate seal imprint, and
• Recent certificate of seal impression

If you are a foreign company, refusing to use the seal may be interpreted as a lack of commitment or compliance readiness.

Internal Controls and Security Best Practices

The seal is a powerful tool. If misused, it can bind the company. You should implement internal controls as early as possible:

Recommended controls

• Seal custodian policy: Assign the seal to a trusted officer.
• Two‑person rule: Require two approvals before using the seal.
• Seal usage log: Record every use (date, counterparty, purpose).
• Physical security: Keep the seal in a locked cabinet or safe.

Example Seal Usage Log

Electronic Signatures in Korea: Do They Replace the Seal?

Electronic signatures are legally recognized, but market practice still favors the corporate seal. Many counterparties accept e‑signatures for lower‑risk contracts, yet ask for the seal for:

• Bank transactions
• Government applications
• Real estate and leases

In other words, e‑signatures can supplement the seal but rarely replace it for critical transactions.

Changes in Representative Director or Company Name

If your company changes its representative director or legal name, you must:

• Update the corporate registry
• Re‑register the corporate seal if the name changes
• Update seals or signature authority at banks

Failure to update seal registration can cause contract rejections and banking freezes.

Common Mistakes and How to Avoid Them

1. Using a non‑registered stamp: Only the registered corporate seal is acceptable for official use.
2. Not updating the seal after a name change: If the company name changes, you must re‑register the seal.
3. Issuing outdated certificates: Old certificates cause delays at banks and public offices.
4. Loose internal control: Seal misuse can lead to unauthorized contracts.

Checklist: Corporate Seal Compliance in 2026

• Create and register the corporate seal immediately after incorporation
• Obtain seal card and issue multiple certificates
• Establish seal custody and approval rules
• Track certificate issuance dates
• Prepare apostilled power of attorney if the director is overseas
• Keep translated versions of key documents

Final Takeaway

The corporate seal is not optional in practice if you do business in Korea. It remains a standard compliance requirement for banks, landlords, and institutional counterparties. Foreign founders should treat seal registration and certificate issuance as a critical post‑incorporation task, not an administrative afterthought.

If you want a streamlined setup and compliance‑ready documentation package, we can handle the seal registration, certificate issuance, and document legalization for you.

📩 Contact us at sma@saemunan.com