What is VAT Number?
A VAT (Value Added Tax) number is a unique identification number assigned to businesses registered for VAT in a jurisdiction. In the EU, VAT numbers follow a standardized format with a country prefix (e.g., GB for the UK, DE for Germany) followed by digits.
Why it matters
VAT numbers are required for cross-border invoicing within the EU and are commonly used as business identifiers in European jurisdictions. Validating VAT numbers is a standard step in vendor onboarding and B2B compliance.