My national identity number/D number does not match my date of birth - what do I do?
When the Norwegian Tax Administration assigns identification numbers (national identity number and D number), there are some dates of birth that do not have any available identification numbers. In that case, the Norwegian Tax Administration assigns an identity number based on the date you were registered and assigned an identification number.
UDI cannot change the national identity number or D number. If you get an identification number that is based on the registration date, your date of birth is still correctly registered in our records and in the National Population Register. This means that you do not need to contact UDI to correct the date of birth in our records.
You can log in and see your date of birth information in the National Population Register (external website), and you can change it if something is wrong.