text: Chile Since 2012, voter registration in Chile is automatic. It is based on a database by the Civil Registry Office of Chileans and resident foreigners in possession of an identity card number, which is unique for each individual when issued and is never re-used after a person's death. All Chileans and eligible foreigners are added automatically to the electoral roll at age 17 and placed on an electoral constituency based on their last reported address with the Office. That address, known as "electoral domicile," can be different from a person's living address, if so desired. The electoral roll may contain a substantial number of persons residing abroad. Residents abroad are not allowed to vote in Chilean elections.
  Czech Republic
  All citizens and residents are included in the national register. Each person is assigned a personal identification number that includes the person's date of birth and is divisible by 11.
  Denmark
  All citizens and residents of Denmark are included in the national register, Det Centrale Personregister. Each person is assigned a personal number of ten digits, which include the person's date of birth. The register is used for tax lists, voter lists, membership in the universal health care system, official record of residence, and other purposes. All eligible voters receive a card in the mail before each election which shows the date, time and local polling place; it may only be presented at the designated local polling station. Only citizens may vote in national elections, while long-time residents may vote in local and regional elections. Permanent address within Denmark is required in order to vote. Voting is voluntary.