Just to add on to the CPR number. As mentioned it contains a birthdate and a gender identification as well as a checksum. Since many refugees don’t know (or ca

Just to add on to the CPR number. As mentioned it contains a birthdate and a gender identification as well as a checksum. Since many refugees don’t know (or can’t prove) their birthdate, they are given first of January. And enough first of Januaries are handed out that for some years there aren’t enough valid numbers, so numbers that fail the checksum are handed out too.