The Election Commission chose high-profile New Delhi constituency to introduce the "Voter Verifiable Paper Audit Trail (VVPAT)" for the assembly polls.
The constituency is witnessing a contest between Chief Minister Sheila Dikshit, Aam Aadmi Party leader Arvind Kejriwal and Bharatiya Janata Party leader Vijender Gupta.
The VVPAT system was launched as a pilot project in New Delhi
In the VVPAT syatem, a printer unit is attached to the electronic voting machine (EVM) to allow a voter to verify details of his/her vote through a transparent window.
Once a voter casts vote by pressing a button on the EVM, a light glows. Under the VVPAT system, the printer kept next to the ballot unit flashes the serial number, name of the candidate and the symbol of party to confirm the voter's choice.
Officials said voters do not get a receipt as proof of their vote due to security reasons and the receipt gets deposited inside a container linked to the EVM after being viewed by the voter.
The VVPAT system was launched as a pilot project in New Delhi.
Officials said the paper trail was first used in a by-boll in Nagaland followed by some constituencies in Mizoram during assembly polls in the state last month.