In Denmark, you do not exist without a CPR number, and you cannot function without a MitID. The days of paper forms and physical signatures are gone. The Danish state is entirely digitized, and these two elements form the absolute foundation of your life here.
Many outdated expat guides—and even some older official documents—will reference "NemID." NemID is dead. It was completely phased out and replaced by the more secure MitID system. Here is the unfiltered guide to securing your Danish identity.
1. The CPR Number
The CPR number is your 10-digit civil registration number (Det Centrale Personregister). It is required to open a bank account, receive a salary, sign a lease, get internet access, or go to the doctor.
The Catch-22
To get a CPR number, you must have a permanent address in Denmark. You cannot use an Airbnb or a hotel for long-term registration without specific documentation. You must have a lease or a statement from your landlord proving you actually live there.
The 3-Month Rule
You must plan to stay in Denmark for more than three consecutive months to be eligible for a CPR number.
The Process
Once you have your work/residence permit and your housing contract, you must apply online and then book a physical appointment at your local municipality's Citizen Service (Borgerservice) or International Citizen Service (ICS) center.
The Paperwork
Bring your original passport, work permit, housing contract, and your original marriage certificate (even if your spouse is not accompanying you).
2. MitID: Your Digital Master Key
While the CPR number is your identity, MitID is how you prove it online. It is a secure smartphone app (or a physical code display if you cannot use the app) that acts as your digital signature.
You will use MitID to log into your online banking, check your tax records on SKAT, access your digital post, and sign official contracts.
Citizen Service will generally set you up for MitID during your physical CPR appointment. You must wait exactly 24 hours after your CPR is issued before activating the MitID app.
Treat your MitID like the keys to a vault. Create a backup of your MitID by installing the app on multiple devices. Never delete the app from your primary phone without having a backup device authorized, or you will lose access.
3. The Yellow Health Card (Sundhedskort)
When your CPR number is successfully registered, the state automatically mails you a yellow plastic card to your registered address within approximately 14 days.