They went door to door: “It was like a census… they were very quick and non-obtrusive visits, someone standing in your doorstep,” he told Breitbart News via e-mail. “They certainly didn’t ask for ID."
It's a list of people living in Canada that were POSSIBLE voters. "According to Elections Canada–the independent, non-partisan agency that runs Canadian elections–“voters were sent a copy of the list showing the name, address and occupation of all voters in the relevant poll.”