The VAT registration number must consist of either 9 or 12 digits. It may sometimes be preceded by two letters.




For example, the following are all valid formats that will be accepted by our system when input into the ‘VAT registration number' field: 


  • 123456789 
  • 123456789012 
  • 123 4567 89 
  • GB123456789 
  • GB123456789012
  • GB 123 4567 89 



Common errors that result in our system being unable to accept the data input into the ‘VAT registration number’ field include: 


  • Entries that do not consist of either 9 or 12 digits. 
  • Entries that include punctuation, or other ‘special characters’. For example, the following are not valid formats for the ‘VAT registration number': 
  • “123456789  
  • 123456789. 
  •  GB-123 4567 89  
  • 123456789 07/09/2023 
  • Entries that consist only of text, such as ‘Not applicable’, ‘N/A’ and ‘Not registered’ or that include text, such as '123456789 agent’.