The state is set to begin the door-to-door phase of the Special Intensive Revision (SIR) on Tuesday. Chief Electoral Officer S Chockalingam, in an interview with Nisha Nambiar, talks about the safeguards against wrongful deletion, how the exercise will be conducted and what documents a voter must keep and present. He also clears the air about migrant voters, duplicate entries, online facilities and why the Election Commission of India insists that the revision will ensure that no eligible voter