Solutions
A company's registered number must be in a valid Companies House format, which is either 8 numbers, or 2 letters followed by 6 numbers.
A valid email address needs to include at least one dot after the
@
and cannot contain any of the following.
Spaces.
Single or double quotes.
More than one dot before the
@.
The Unique Tax Payer Reference needs to be in a valid HMRC format of 10 digits.
A VAT registration number must be in a valid HMRC format, which has a country code of 2 letters followed by 9 digits.
The 9 digits need to be arranged in a block of 3, a block of 4, then a block of 2. For example, GB123 4567 89.
The spaces between blocks of digits can be replaced by hyphens. For example, GB123-4567-89.