When making an application to register a vehicle for the first time, an applicant is required to furnish such particulars as may be required by the Secretary of State. In order to enable checks to be carried out, where necessary, to confirm the name and address given by an applicant to register a vehicle, forms used throughout the UK require the completion of the applicant's date of birth.
In addition, applicants for other services, such as the renewal of a tax disc, are also asked to provide their date of birth, but it is pointed out that the provision of the information is entirely voluntary. Having the date of birth enables cross-checks to be made with the driver licensing database, where date of birth is one of the indexes used. This cross-referencing means that changes of address notified on vehicle licensing forms can be used to update the driver licensing record.