Does your RCS / LBR entry match your website?

Why it matters

Every Luxembourg company has an entry in the Trade and Companies Register, the RCS (Registre de commerce et des sociétés). It is run by Luxembourg Business Registers (LBR) and holds your official facts: your legal name, legal form, registered office address, the people who represent the company, and your filed documents such as annual accounts. It is a public register, so anyone can look you up, people and software alike.

When your website says one thing and the register says another, a reader has two versions of who you are. A different spelling of the legal form, an old registered office in the footer, or a trading name with no visible link to the company behind it is enough to make it look like two businesses. This guide checks the two side by side and tells you which one to correct.

Illustration with a fictional business.

Reference

What to compare

Guichet.lu lists what a commercial company registers: its name, legal form, registered office address and purpose, the date of incorporation and, depending on the form, the capital, the partners and the directors who can bind the company. Four of these usually appear on a website, so those are the ones to compare.

Before you start

Have these ready

• Your RCS number. For an SARL or SARL-S, guichet.lu says legal documents must show it, so it is on your invoices and letterhead. If you cannot find it, you can search the register by company name instead.
• Your website open on the footer, the legal notice page (often called "Legal notice", "Mentions légales" or "Impressum") and the contact page.
• Your fact sheet from Guide 04, if you have one. This check fills in its "Legal name" and "RCS number" lines.

Steps

Check your entry against your website

1. Look up your own entry

   Go to lbr.lu, the official portal of Luxembourg Business Registers. The European e-Justice portal confirms that anyone can search the register by registration number or by company name, and that documents filed with the register can be viewed free of charge. Official extracts, certificates and certified copies cost a fee. You do not need a paid extract for this check: your entry and filed documents are enough.

   Search by your RCS number if you have it. It returns one company, while a name search can return several with similar names.

2. Copy your legal name exactly

   Write down the name as the register shows it, character for character: capital letters, accents, dots, spaces and hyphens. Then search your website for every place your company name appears with its legal form, and compare.

   The legal form is where most mismatches hide, because it can be written several ways. Guichet.lu, for example, writes the forms as SARL and SARL-S, and spells them out as "société à responsabilité limitée" and "société à responsabilité limitée simplifiée". Your own registered name may use another spelling, such as S.à r.l. Whichever your entry uses, use that one everywhere.

   Where	What it says	Matches?
   RCS entry	Veldrin S.à r.l.	Reference
   Website footer	Veldrin SARL	No
   Legal notice page	Veldrin Sàrl	No
   Structured data	Veldrin S.à r.l.	Yes

   Example with a fictional business.

3. Compare the registered office

   Your registered office is the address in the register. It is not always where customers visit you: some companies are domiciled at a fiduciary's address, under a domiciliation agreement, and work from another office.

   • If the two are the same, check that the address on your website is written the same way as in the register.
   • If they differ on purpose, label them on your website: "Registered office" for the register address on the legal notice page, and "Our office" or "Visit us" for the address customers use. Two unlabelled addresses look like a mistake.
   • If your website shows an old registered office, update it now.

4. Link your trading name to your company

   Many businesses are known by a name that is not their legal name: "Fiduciaire Veldrin" for Veldrin S.à r.l., or "Café Ribeiro" for a company with a family name. Customers, listings and assistants use the trading name; the register uses the legal name. Nothing connects the two unless you say so.

   Add one plain sentence to your About page and your legal notice page, with the legal name copied from step 2:

   Sentence for your About and legal notice pagesCopy

   Fiduciaire Veldrin is the trading name of Veldrin S.à r.l., registered with the Luxembourg Trade and Companies Register (RCS) under number B000000.

   Fictional business and number. Use your own name and RCS number.

5. Decide which side to correct

   For every mismatch, ask one question: which one is out of date?

   • The website is wrong. This is the usual case and the easy one. Change the website to match the register, in every language version.
   • The register is out of date. For example, you moved but never filed the new registered office, or a manager has left. Then the change must be filed with the RCS.

   How a change reaches the register (high level, not legal advice)

   Guichet.lu describes the route. Filings are made online through the LBR platform, and must be made within one month of the event that triggered them. The filing can be made by the company itself, a representative such as your fiduciary, the notary who drew up the deed, or the Chamber of Commerce or Chamber of Skilled Trades and Crafts. Each filing carries a fee, set in the LBR tariff.

   If the change is to your articles of association, the form of your company matters. Guichet.lu says that for an SA, SARL, SCA or SE, the articles and any amendment are drawn up before a notary, and the notary files them with the RCS. Partnerships, civil companies and cooperatives (SENC, SCS, SC, SCOP) can use a private deed. After an amendment, the updated (coordinated) articles must be filed too.

   A filing is published in the RESA, the official electronic gazette, on the day of filing or on a date you choose within 15 days. It applies to third parties only from that publication.

   Ask your fiduciary or notary which route applies to your change. The guichet.lu pages in the sources below have the details and forms.

   Once the register is updated, check your entry again and then update your website to match it, not the other way round.

6. Show your RCS number on your website

   Put your legal name and RCS number in your footer, so they are on every page, and on your legal notice page. For example, a footer that reads "Fiduciaire Veldrin SARL · RCS Luxembourg B000000" (a fictional business and number) lets anyone, person or machine, take that number to lbr.lu and confirm the business is who it says it is.

7. For your developer: add the register facts to your structured data

   If you followed Guide 05, your homepage already has an Organization or LocalBusiness block. These schema.org properties fit register facts:

   • legalName: schema.org defines it as the official name, "e.g. the registered company name". Google says to use it when it differs from name.
   • identifier: schema.org's general property for any kind of identifier. A PropertyValue lets you say which identifier it is, with propertyID and value.
   • vatID: your VAT number with its country prefix, if you have one.
   • leiCode or iso6523Code: only if your company has a Legal Entity Identifier (LEI). Google encourages iso6523Code with the prefix 0199: instead of leiCode.

   Lines to add inside your existing blockCopy

   "name": "Fiduciaire Veldrin",
   "legalName": "Veldrin S.à r.l.",
   "identifier": {
     "@type": "PropertyValue",
     "propertyID": "RCS Luxembourg",
     "value": "B000000"
   },
   "vatID": "LU00000000",

   Fictional values. Copy yours from your RCS entry and your VAT documents.

   Use exactly the same name and number as your footer and legal notice. Google lists no required properties for Organization and does not say it uses identifier, so treat this as making your facts explicit, not as a ranking step.

Check it worked

Confirm the facts now match

Open your register entry and your website side by side, and read each field aloud from one while you look at the other.

Common mistakes

What usually goes wrong

• "Tidying up" the legal form. Writing SARL on the website because it looks cleaner, when the register says S.à r.l., creates a second version of your name.
• Moving and forgetting the register. The website shows the new office, the RCS still shows the old one, and every site that reads the register repeats it.
• Changing the website before the register. If you are filing a change, update the website once the change is in the register, so the two never disagree in the other direction.
• Paying for an extract you do not need. To compare facts, looking up your entry is enough. Order a certified extract only when someone asks for an official document.
• Fixing only one language. The legal notice in French says one thing and the German one another.