Definition: A D‑number (Norwegian: d‑nummer) is a temporary identification number used for people who need an identity number in Norway but do not meet the conditions for a full national identity number (fødselsnummer). In practice, it is common for migrants, short‑term workers, and cross‑border families.
What a D‑number is used for
- Opening a bank account
- Tax and employer reporting
- Contact with public authorities that require an ID number
- Administrative processes connected to residence permits and identity checks
How you get a D‑number (important nuance)
You typically do not apply “directly” for a D‑number as a consumer. Instead, the D‑number is often requested/ordered by an authority or organization that needs it to process something (e.g., tax card, immigration registration, business registration). The exact route depends on your situation.
Common situations
- Immigration registration: UDI/Police (PU) may issue/trigger a D‑number during registration processes for certain groups.
- Tax card / work: the Tax Administration can assign a D‑number when you need a tax deduction card and lack a Norwegian ID number.
- Business roles: a D‑number can be needed for board members/contact persons with reporting obligations.
DBN practical checklist
- Verify which authority should order it for your situation (UDI/Police vs Tax vs Brønnøysund Register Centre).
- Prepare for ID check requirements where applicable (passport/approved ID, appointments).
- Keep copies of letters and numbers (D‑number, DUF number) — they are used across systems.
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