Is the biometric data used in voter identification at polling stations?

South Africa, Election Commission, How to vote, accessed 30 June 2019

“At the entrance of the voting station is an election official who serves as a door controller. He or she will check that you have a valid identification document (green barcoded ID book, smart-card ID or temporary ID certificate), will scan this document, and present you with a slip that confirms that you are a registered voter. The door controller will also tell you when it is your turn to enter the station and will advise where to go once inside the voting station.

Once inside the voting station you will proceed to the voters’ roll table where election officials will take your ID document and check for your name and identity number on the segment of the national common voters’ roll for that voting district. Your name will then be crossed off – this is a manual mechanism for ensuring that voters only vote once. An election official will then ink your left thumb nail. This is a special ink that will not wash off your nail for several days. This ink mark will show everyone that you have participated in the election!”