KYC questionnaire for a company in Luxembourg
Published on 10 October 2026 · Updated on 10 October 2026
In short
A KYC questionnaire for a company (Know Your Customer) gathers the identification details of each shareholder, manager and beneficial owner: identity, address, nationality, role, shareholding, politically exposed person status and source of wealth. In Luxembourg, banks, notaries, domiciliation agents and fiduciaries must collect this information before entering into a relationship.
Definition
KYC (Know Your Customer) is the set of due diligence measures that a professional subject to the Law of 12 November 2004 applies to its clients: identifying the client and its beneficial owners, verifying that identity against documents, understanding the purpose of the relationship and monitoring it over time.
Downloadable template
Word format, to fill in. Preparatory document, not an official form or legal deed.
Good to know
- Who completes it
- Each shareholder, manager and beneficial owner, one questionnaire per person
- Who asks for it
- Bank, notary, domiciliation agent, fiduciary, accountant, lawyer
- Legal basis
- Amended Law of 12 November 2004, article 3 on customer due diligence
- Link with the RBE
- The same identity data is used for the declaration of beneficial owners
How to complete the questionnaire
- 1
Identity and contact details
Surname, first names, date and place of birth, nationalities, residential address, exactly as on the identity document.
Each person - 2
Role in the company
Shareholder, manager, director, beneficial owner, and percentage held directly or indirectly.
Each person - 3
Politically exposed person status
Prominent public function held by you, a family member or a close associate.
Each person - 4
Activity and wealth
Occupation, income and source of wealth: savings, sale, inheritance, earned income.
Each person - 5
Supporting documents
Copy of the identity document, recent proof of address and, if needed, proof of wealth.
Each person
Mistakes that delay a file
- Incomplete or outdated address: the proof of address must match the declared address and be recent.
- Forgotten indirect holdings: a person who holds shares through another company may be a beneficial owner.
- PEP status misunderstood: it also covers family members and close associates of an exposed person.
- Vague source of wealth: "personal savings" with no explanation or document almost always prompts a follow-up question.
A preparatory document
This template is not an official form. Each professional uses its own questionnaire and may ask for other information depending on its risk assessment. The template helps you gather your answers and documents in advance, so you can complete each party’s forms quickly.
Next step
Prepare your KYC file with us
We check that your answers and documents are consistent before sending them to the bank, the notary or the domiciliation agent.
Frequently asked questions
Who must complete a KYC questionnaire when forming a company?
Each shareholder, each manager and each beneficial owner, meaning any individual who ultimately owns or controls the company; holding more than 25% of the capital is an indicator. If a shareholder is a company, its own beneficial owners are identified in turn. One questionnaire per person avoids confusion.
What is a politically exposed person?
The Law of 12 November 2004 covers individuals who hold or have held a prominent public function, such as a government or parliamentary mandate or a senior judicial or military post, as well as their family members and close associates. This status does not prevent you from forming a company, but it leads to enhanced due diligence.
Why do several professionals ask for the same information?
Each professional subject to anti-money laundering obligations must apply its own due diligence measures and keep its own documents. The bank, the notary and the domiciliation agent therefore cannot simply rely on another party’s file. A questionnaire prepared once speeds up each of these steps.
Is my information public?
KYC information stays with the professionals who collect it, who are bound by professional secrecy and the GDPR. However, part of the beneficial owners’ data is declared to the beneficial owners register (RBE), and access to that register is regulated by law.