Business Registration Number
A business registration number is a unique identifier assigned by a government authority to a legally registered business entity. Every jurisdiction uses its own system: EIN — Employer Identification Number (US), Company Number (UK), SIREN/SIRET (France), Handelsregisternummer (Germany), KvK-nummer (Netherlands), NIF — Numero de Identificacion Fiscal (Spain), and NIPC — Numero de Identificacao de Pessoa Coletiva (Portugal). These identifiers enable official identification, tax reporting, and regulatory compliance.
Business registration numbers serve as the primary key for identifying legal entities in government databases, tax systems, and commercial registries. Their structure and issuing authority vary by country:
- **United States**: The EIN (Employer Identification Number), issued by the IRS, is a 9-digit number (XX-XXXXXXX) used for tax filing, banking, and regulatory reporting. It is also known as a Federal Tax ID. - **United Kingdom**: The Company Number, assigned by Companies House, is an 8-character identifier. Businesses also receive a UTR (Unique Taxpayer Reference) from HMRC and a VAT registration number if applicable. - **France**: SIREN (9 digits) identifies the legal entity, while SIRET (14 digits = SIREN + 5-digit NIC) identifies each physical establishment. Both are assigned by INSEE and must appear on invoices and contracts. - **Germany**: The Handelsregisternummer (HRB/HRA number) identifies companies in the commercial register. Businesses also receive a Steuernummer (tax number) and USt-IdNr (VAT ID). - **Netherlands**: The KvK-nummer (8 digits) from the Chamber of Commerce identifies the legal entity, while RSIN is used for tax purposes. - **Spain/Portugal**: NIF (Spain) and NIPC (Portugal) serve as both business identification and tax identification numbers.
In KYC and business verification procedures, registration numbers enable authentication of a company's legal existence, verification of declared information, and cross-referencing with official databases. These identifiers must legally appear on invoices, contracts, and official correspondence in most jurisdictions.
Document verification solutions like CheckFile.ai leverage these numbers to automate compliance checks. Automatic extraction of registration numbers from business documents (registration certificates, invoices, contracts) enables instant validation of a company's identity by querying public registries, detecting fraudulent numbers or deregistered businesses.
Regulations
Real-world examples
- 1A US bank verifies a new business client's EIN by cross-referencing it with IRS records and the state Secretary of State database to confirm the entity is active and in good standing.
- 2An electronic invoicing platform in Europe automatically extracts VAT IDs and company registration numbers from supplier invoices to validate the issuer's identity before processing payment.
- 3A UK commercial landlord checks a prospective tenant's Companies House number before signing a lease to verify that the company legally exists and is not undergoing insolvency proceedings.