CivilRegistrationNumber (PNR) Description: Unique identification of a person The Civil Registration System contains: - Data on persons, who after 1968 April 2nd Danish registry of citizens. As for Greenland the corresponding date is 1972 may 1st. - Danish citizens living outside Denmark (who must pay duty and ATP) has also been given a civil registration number. - Civil registration numbers are also assigned for other administrative purposes. Value space: The civil registration number consists of two parts. The first part is the valid birthday in the form DDMMYY. The following part is a serial number of four digits. The civil registration number may also hold the value 0000000000. This value is used where the civil registration number is required but unknown. Lifecycle: The civil registration number is generated and assigned at birth, entry and change of civil registration number of for administrative reasons. The civil registration number may be assigned via hospitals. The civil registration number is not to be deleted. Remarks: 1994 June 11th the civil registration number was changed according to this description.