United Kingdom

Validate tax registration numbers as per United Kingdom's validation rule. All businesses in United Kingdom are assigned a global unique identifier called United Kingdom GB VAT.

Ensure that the following details are correct for United Kingdom GB VAT:

• Country Code: GB

• Validation Type: ORA_GB_VAT

• Description: United Kingdom GB VAT

• Number of digits: 5, 9, 12

• Format:

  Two character Country code(GB) + 3/7/10 digit numeric

  GB999 / GB9999999 / GB9999999999

  Two character Country code then 123 / 1234567 / 1234567891 (3/7/10 characters)

  Government Department/Health Authority 7 characters: A(1-4)+ N(1-3)

  Standard 11 Character: A(1-2)+ N(1-9)

  Commercial Group 12 Characters: A(1-2)+ N(1-10)

  Isle of Man (Normal) 14 Characters: A(1-2)+N(1-12)

  Isle of Man (Commercial Group) 15 Characters: A(1-2)+N(1-12)

  A(1-2) = {GB}

• Check digits: Yes, last digit

• Check Digit Validation:

  11 , or 12 Characters: S=8*N(1)+7*N(2)+6*N(3)+5*N(4)+4*N(5)+3*N(6)+2*N(7) if S%97= N(8-9) then correct

  14 , or 15 Characters: S=8*N(4)+7*N(5)+6*N(6)+5*N(7)+4*N(8)+3*N(9)+2*N(10) if S%97= N(11-12) then correct

• Default Validation: ORA_GB_VAT

Example:

Good:

• GBGD123

• GBHA567

• GB391313073

• GB417258843

• GB940068928

• GB1234567823

• GB001123456782

• GB0011234567823

Bad:

• GCHA567 (Invalid country code)

• HA567 (Missing country code)

• GB12345678 (Invalid format - too short)

• GB0011234567823 (Invalid format - too long)

• GB123456781 (Invalid check digit)