What is VAT Identification number?

EU-State Name of VAT-Nr Abbr. syntax of VAT-ID-Nr (country code) # of further digits
Belgium Numéro T.V.A / BTW-Nummer N° TVA / BTW-nr BE 9
Denmark Varemodtagers moms-nr SE-nr DK 8
Germany Umsatzsteuer- Identifikationsnummer USt-IdNr. DE 9
Finland Arvonlisäveronumero ALV-nro FI 8
France Numéro d'identification TVA ID. TVA FR 11
Greece A.ø.M. (Tax Registration N°) A.ø.M. EL 8
Ireland VAT Registration Number VAT REG NO IE 8
Italy Codice IVA (Numero Di Partita IVA) P.IVA IT 11
Luxemburg Numéro d'identification TVA ID. TVA LU 8
The Netherlands Omzetbelastingnummer OB nummer NL 12
Portugal Numero de identificacao fiscal NIPC PT 9
Austria Umsatzsteuer- Identifikationsnummer UID ATU 8
Sweden Moms Registrerings Nommer Moms Reg. No. SE 12
Spain Numero De Identificacion Fiscal N.I.F. ES 9
UK VAT Registration Number VAT REG NO GB 9 to 12

Only subscribers in countries of the European Union (EU) except Germany, need to disclose their VAT number. This is for proper handling of the VAT