Document Issuance

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What you can issue

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Requirements

• Hometax documents are issued for the business that owns the API key. Register a joint certificate in the Bolta dashboard.
• A corporate registry is issued for the corporation in document.corporationNumber. Supported corporation types are stock company, limited company, general partnership company, limited partnership company, limited liability company, incorporated association, incorporated foundation, medical corporation, cooperative (including social cooperative), and other corporate entity (such as a patent corporation). No joint certificate is needed.

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Pricing

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Supported documents

• Business registration certificate reissue: Bolta prints reason as is on the certificate. Enter the actual reason, for example 분실 (lost). The API trims leading and trailing spaces. It returns 400 INVALID_REQUEST if the reason is empty, longer than 10 characters, or contains control characters.
• Business registration proof: If language is missing, the API returns 400 INVALID_REQUEST. Bolta issues the English version (EN) with the English business information registered in Hometax. If that information is missing or malformed, the request ends as FAILED and deducts no points. To change the English details, update them in Hometax first.
• Tax payment certificate: Hometax does not issue it while national taxes are in arrears. The certificate is valid for 30 days from the issue date.
• VAT tax base proof: Set from to January or July and to to June or December. from cannot be later than to; otherwise the API returns 400 INVALID_REQUEST. One request covers up to five years.
• Standard financial statement proof: For a corporation with a December year end, enter 2025-12 for fiscal year 2025. For a sole proprietor, only the year is used. Only fiscal years with a filed corporate or comprehensive income tax return can be issued. For a fiscal year that has not ended (a year end in or after the current month), the API returns 400 PERIOD_NOT_CLOSED and reserves no points. If the fiscal year has ended but the return is not filed yet, the request ends as FAILED and deducts no points.
• Certified copy of corporate registry: Bolta issues it from the Internet Registry Office. Enter corporationNumber as digits only, such as 1101111234567, or with a hyphen, such as 110111-1234567. If the format is wrong, the API returns 400 INVALID_REQUEST. Set cancelledEntries to choose whether cancelled entries are included. If you omit it, the API returns 400 INVALID_REQUEST. The view copy is for checking the contents. Request the submission copy when you need to submit the document to a government office or bank. If another request is issuing the same document with the same cancelledEntries for the same corporation, the API returns 409 TARGET_BUSY. Request again after that request finishes.

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Issuance hours

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Request a document

curl -X POST https://xapi.bolta.io/v1/documentIssuances \
  -H "Authorization: Basic {apiKey}" \
  -H "Bolta-Client-Reference-Id: order-20260919-001" \
  -H "Content-Type: application/json" \
  -d '{
    "document": { "type": "BUSINESS_REGISTRATION_PROOF", "language": "KO" }
  }'

{
  "document": { "type": "CORPORATE_REGISTRY_ISSUANCE", "corporationNumber": "110111-1234567", "cancelledEntries": "EXCLUDE" }
}

{
  "issuanceKey": "00000000-0000-4000-8000-000000000001",
  "clientReferenceId": "order-20260919-001",
  "type": "BUSINESS_REGISTRATION_PROOF",
  "language": "KO",
  "status": "ACCEPTED",
  "requestedAt": "2026-09-19T03:00:00Z",
  "issuedOn": null,
  "retentionExpiresAt": null,
  "downloadUrl": null,
  "downloadUrlExpiresAt": null
}

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Retrieve the result

curl https://xapi.bolta.io/v1/documentIssuances/{issuanceKey} \
  -H "Authorization: Basic {apiKey}"

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Test key

• Hometax documents always end as COMPLETED right away.
• A corporate registry gets its result from corporationNumber. Test keys accept only the numbers below. For any other number, the API returns 400 INVALID_REQUEST.

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Errors