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Company details for your email signature

Choose the country, enter the company ID or name, and the tool fills in the official details from a free public register where one exists, then builds the legal details that country asks for on business letters, ready for your email signature.

Details of the Czech business

Without JavaScript the tool cannot load data from ARES. Below is a template you can overwrite with your own details and copy.

Your legal block

The block is in Czech, the way it appears on Czech business documents.

What § 435 of the Czech Civil Code requires

  • Name (business name)
  • Registered office (for sole traders the place of business)
  • Register entry: commercial register including section and insert, otherwise the other register or record (for sole traders the trade licence register)
  • IČO, if one was assigned

§ 435 does not require the DIČ; you may add it if you want to.

What to state in each country

A short overview of the business-letter rules and the free register the tool can query.

CountryWhat to stateLegal basisFree lookup
CzechiaRegistered name, Registered office address, Register / registry court, Registration number, Company IDARES
SlovakiaRegistered name, Legal form, Registered office address, Register / registry court, Registration number, Company IDRegister právnických osôb (RPO); VAT ID in VIES
GermanyRegistered name, Legal form, Registered office (town), Register / registry court, Registration number, All managing directorsVAT ID in VIES
AustriaRegistered name, Legal form, Registered office (town), Register / registry court, Registration numberVAT ID in VIES
PolandRegistered name, Registered office (town), Registered office address, Register / registry court, Registration number, Company ID, Share capital (paid up)

not checked against the official text

Wykaz podatników VAT (Biała lista)
FranceRegistered name, Legal form, Registered office address, Register / registry court, Company ID, Share capital (paid up)

not checked against the official text

Annuaire des Entreprises (API Recherche d’entreprises)
United KingdomRegistered name, Registered office address, Part of the UK where registered, Registration numberCompanies House (needs an API key on the site)
NetherlandsRegistered name, Legal form, Registered office (town), Company IDVAT ID in VIES
BelgiumRegistered name, Legal form, Registered office address, Register / registry court, Company IDVAT ID in VIES
DenmarkRegistered name, Registered office (town), Company ID

not checked against the official text

VAT ID in VIES
NorwayRegistered name, Legal form, Registered office (town), Company IDEnhetsregisteret
IrelandRegistered name, Legal form, Registered office address, Registration number, All managing directorsVAT ID in VIES
ItalyRegistered name, Registered office address, Register / registry court, Registration number, Share capital (paid up)

not checked against the official text

VAT ID in VIES
SpainRegistered name, Legal form, Registered office address, Register / registry court, Registration numberVAT ID in VIES
SwitzerlandRegistered nameUID-Register
United StatesNo general requirement; marketing emails need a postal address (CAN-SPAM).

not checked against the official text

none, fill in by hand
Other countryRegistered name, Registered office address

    not checked against the official text

    		none, fill in by hand

    This is not legal advice. Rules change and depend on the legal form; if you are unsure, check the details with a lawyer or tax advisor.

    Czech Republic: why these details belong in the signature

    Under § 435 (1) of the Czech Civil Code every business must state its name and registered office on business documents; a business in the commercial register adds the register entry including section and insert, others state their entry in another register or record, and the IČO is added if one was assigned.

    Courts have not expressly confirmed whether every email is a business document. In practice companies put these details in their signature because offers, orders and invoices are routinely sent by email.

    Under § 435 (2) you may add further details as long as they are not misleading. If a capital company or cooperative states its registered capital, § 7 of the Czech Business Corporations Act allows only the subscribed and paid-up part.

    Read § 435 of the Civil Code (Czech)

    This is not legal advice. If you are unsure, check the details with a lawyer.

    Create the whole signature in the editor

    In the editor, paste the block into the “Legal details (bottom of the signature)” field in the Content section, or load it there from the register with your company ID.

    Open the editor

    Frequently asked questions

    Do I need these details in my emails?

    § 435 of the Czech Civil Code requires them on business documents. Whether every email counts as one has not been expressly confirmed by the courts, but it is common practice to include them, especially when you send offers, orders or invoices by email. This is not legal advice.

    What if I am a sole trader (OSVČ)?

    State your name, place of business, IČO and the register you are entered in; for a trade licence that is the trade licence register (živnostenský rejstřík). If you do business under another law, for example as a lawyer or doctor, write the register or chamber you are entered in instead.

    Do I need to include the DIČ?

    No, § 435 does not require the DIČ (tax ID). Many companies add it anyway. For sole traders the DIČ is often formed from the birth number, so the tool leaves it out by default for them.

    Is my data stored?

    No. The ID or name you enter is sent through our server to the public register of the chosen country (for example ARES of the Czech Ministry of Finance, the Slovak RPO, the French Annuaire des Entreprises, the Norwegian Brønnøysund registers, the EU’s VIES or the GLEIF LEI register), and nothing is stored in a database. The public answer can be cached for up to 24 hours so that repeated lookups do not burden the registers, and like any web request the call can briefly appear in our hosting provider’s technical logs. The form itself is processed in your browser.

    Which countries does the tool cover?

    Czech Republic, Slovakia, Germany, Austria, Poland, France, the United Kingdom, the Netherlands, Belgium, Denmark, Norway, Ireland, Italy, Spain, Switzerland and the United States, plus a general form for other countries. Data is loaded from free official registers in the Czech Republic (ARES), Slovakia (RPO), France, Norway, Poland (VAT taxpayer list), Switzerland (UID register) and the United Kingdom (Companies House, where switched on); for EU countries without a free register a VAT ID can be checked in VIES. Germany, Austria, the Netherlands and Ireland have no free official register API, so you fill in the details yourself.