• oter-verified paper audit trail (VVPAT) or verified paper record (VPR) is a method of providing feedback to voters using a ballotless voting system.
• A VVPAT is intended as an independent verification system for voting machines designed to allow voters to verify that their vote was cast correctly, to detect possible election fraud or malfunction, and to provide a means to audit the stored electronic results.
• It contains name of the candidate (for whom vote has been casted) and symbol of the party/ individual candidate.
• The VVPAT offers some fundamental differences as a paper, rather than electronic recording medium when storing votes.
• A paper VVPAT is readable by the human eye and voters can directly interpret their vote. Computer memory requires a device and software which potentially is proprietary.
• Insecure voting machine records could potentially be changed quickly without detection by the voting machine itself.
• It would be more difficult for voting machines to corrupt records without human intervention. Corrupt or malfunctioning voting machines might store votes other than as intended by the voter unnoticed. A VVPAT allows voters the possibility to verify that their votes are cast as intended and can serve as an additional barrier to changing or destroying votes.
• The VVPAT includes a direct recording electronic voting system (DRE), to assure voters that their votes have been recorded as intended.
• It is intended, and some argue necessary, as a means by which to detect fraud and equipment malfunction. Depending on election laws the paper audit trail may constitute a legal ballot and therefore provide a means by which a manual vote count can be conducted if a recount is necessary.
• VVPAT -fitted EVMs will be used in entire Goa state in the 2017 assembly elections, which will be the first time that an entire state in India will see the implementation of VVPAT.

Source: Wiki