Biometrics

In 2000, though technology was successfully employed in the electoral process through electronic voting machines, the voter identification procedure still depended entirely on human intervention. The poll workers received the documents of the person intending to vote, checked their data, typed the registration number in the electronic voting machine, and, if the voter card was registered in that polling station, released themachine for voting.  

Since 2008, the Electoral Justice has opted to use fingerprints to biometrically identify the electorate. After the success of the tests carried out in three cities, the Court decided to expand the project to another 57 municipalities. Thus, in that year's general elections, 1.1 million voters voted through biometric identification.  

Since then, the technology has been widely implemented in the country, and until June 2026, more than 141 million voters - around 89% of the total electorate able to vote - had their fingerprints registered through this system.

Biometric identification makes the electoral process even more secure by preventing one person from voting for someone else, making it possible to detect voters registered more than once in the Electoral Register. The adoption of biometrics is another initiative by the Electoral Justice to reduce human intervention in the voting process. In addition, biometrics is one of the elements that make up the database of the National Civil Identification, a program created to identify Brazilians in their interactions with the State, thereby providing security and ease in the use of various identification services.  

The collection of biometrics is a mandatory and free electoral service, carried out only in person at the electoral registry offices. 

For further information go to https://www.justicaeleitoral.jus.br/biometria/