First of all we need to see what type of information is on the paper petitions. Most of the time you would not get very much detailed information on the individual. People can be identified through a general address, which would not be exactly useful for electoral purposes, if that's the concern you have.
Once a paper petition is tabled in the House, it's provided to the government. The government would respond to it. They would keep essentially the first page or two of it after counting the.... You may be in a position to have more information than I do on that one. The rest of the petition is not kept.