If so, you’ll have to book an appointment with the Tax Administration for an ID check. The organisation that orders a D number for you can require a verification of your identity. For example, if your application was registered on 15 January 2020, the first digits in your D number would be 550185.
If there is not an available D number for your birth date, the registration date will be used instead. For example, if you’re born on 1 January 1985, the first digits in your D number would be 410185. The first 6 digits show date of birth, where the first digit is increased by 4.
NAV – for EEA jobseekers and/or recipients of national insurance benefits.The Tax Administration – for persons who are liable to pay tax and duties.