Europe • ISO LU
Verify Luxembourg companies via API
Know Your Customer Limited verifies Luxembourg companies live from the Luxembourg Business Registers, returning company data, controlling parties, shareholders and beneficial owners, and registry documents, with AML screening and ongoing monitoring. Free sandbox available.
What the API returns for Luxembourg
When you create a KYB case for a Luxembourg company, Know Your Customer Limited retrieves data live from the Luxembourg Business Registers. A single integration returns the company record, the controlling parties and individuals, the shareholders and beneficial owners, and the registry documents, with AML screening on the entity and its associated individuals built into the same case.
Luxembourg data and document availability
What the API makes available for Luxembourg companies:
| Category | Available |
|---|---|
| Company data | Entity Name, Entity Type, Registration Number, Entity Status, Address, Registration Date, Dissolution Date, Activity Type, Termination of domiciliation agreement, EUID Number, Foreign Company Jurisdiction, Foreign Company Number, Foreign Company Register |
| Controlling entities & individuals | Name, Role, Address, Appointed On |
| Shareholders & beneficial owners | Name, Role, Address, Nationality (if individual), Share count |
| Documents | Retrieved by default: Registration Extract, Articles of association, Registration Certificate, Annual Accounts Available on demand: Modification, Branch registration, Non-statutory modification of the agents (corrective), Non-statutory modification of the agents, Negative Certification, Resignation |
AML, sanctions, and PEP screening on the entity and its associated individuals, and ongoing live monitoring with change alerts, are available for Luxembourg as part of the same case.
How to verify a Luxembourg company via API
The following example shows the complete flow: authenticate, search the Luxembourg registry, create a KYB case, and retrieve company data and the ownership org-chart. All calls go to the sandbox base URL for testing.
The sandbox at https://api.knowyourcustomer.dev is free. Request access to get your client credentials.
# 1. Authenticate (OAuth2 client credentials)
curl -X POST https://api.knowyourcustomer.dev/connect/token \
-d "grant_type=client_credentials" \
-d "client_id=YOUR_CLIENT_ID" \
-d "client_secret=YOUR_CLIENT_SECRET" \
-d "scope=PublicApi"
# 2. Search the Luxembourg registry
curl -X POST https://api.knowyourcustomer.dev/v2/Companies/search \
-H "Authorization: Bearer $TOKEN" \
-H "Content-Type: application/json" \
-d '{"name":"Luxembourg National Bank","codeiso31662":"LU"}'
# 3. Create a KYB case
curl -X POST https://api.knowyourcustomer.dev/v2/Companies \
-H "Authorization: Bearer $TOKEN" \
-H "Content-Type: application/json" \
-d '{"rawname":"Luxembourg National Bank","codeiso31662":"LU"}'
# 4. Retrieve company data and status
curl https://api.knowyourcustomer.dev/v2/Companies/CASE_ID \
-H "Authorization: Bearer $TOKEN"
# 5. Get the beneficial ownership org-chart
curl https://api.knowyourcustomer.dev/v2/Companies/CASE_ID/org-chart \
-H "Authorization: Bearer $TOKEN"
Replace YOUR_CLIENT_ID and YOUR_CLIENT_SECRET with your sandbox credentials, and CASE_ID with the caseCommonId returned in step 3.
Frequently asked questions about the Luxembourg KYB API
What company data can I verify in Luxembourg?
For a Luxembourg company, the API returns the company record read live from the Luxembourg Business Registers: the entity name, type, status, registration number, address, and registration date, along with the controlling parties, the shareholders and beneficial owners, and the available registry documents. See the table above for the full Luxembourg availability.
Does the API return beneficial ownership (UBO) data for Luxembourg companies?
The API resolves the controlling parties, shareholders, and beneficial owners for Luxembourg companies and exposes them as a recursive ownership org-chart (GET /v2/Companies/{caseCommonId}/org-chart), tracing control through holding companies to the individual beneficial owners. The depth available depends on what the Luxembourg Business Registers discloses. See the UBO API.
Can I retrieve official registry documents for Luxembourg companies?
Yes. The default document set for Luxembourg includes Registration Extract, Articles of association, Registration Certificate, Annual Accounts, retrieved by default, with additional documents available on demand (Modification, Branch registration, Non-statutory modification of the agents (corrective), Non-statutory modification of the agents, Negative Certification, Resignation). List and download them with the documents endpoint (GET /v2/Companies/{caseCommonId}/documents).
Is there a free sandbox for testing Luxembourg company verification?
Yes. The Know Your Customer sandbox at https://api.knowyourcustomer.dev is a free, high-fidelity test environment. Request free sandbox access to start testing.
The Know Your Customer Limited API covers 147 jurisdictions worldwide, including Luxembourg. One integration, one set of credentials, one response schema across all markets. Browse all covered jurisdictions.
Related coverage: United Kingdom • Aaland Islands • Albania • Austria • Belarus • Belgium.
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