David Witzel was confused and worried when two voter cards bearing his name showed up in the mail this week.

But the Scarborough resident wasn't alone -- about 200 people living in his apartment building also received two voter cards for the Oct. 10 provincial election.

Witzel said one voter card showed up in his mailbox on Monday, followed by another on Wednesday.

After Witzel received them, he looked into the garbage room of 51 Trailridge Cres., and found 16 more voter cards in the trash.

"My biggest concern is that ... maybe the election could be turned on somebody fraudulently using these forms," he said.

An Elections Ontario representative, however, told CTV News two voter cards bearing the same person's information couldn't both be used at the ballot box.

"Ontarians who receive two cards have nothing to worry about," Shawn Pollock said.

"That elector's name is only going to appear once on the voters list."

Pollock said the duplicates are actually revised cards, reissued when government agents visiting high-mobility areas or new developments get more up-to-date information.

About 8.5 million outdated cards were already sent to the printer before agents gathered new information, CTV News has learned.

Several other residents in Toronto who have also received multiple voter cards have contacted CTV News since the story first aired late Wednesday night.

With a report from CTV's Galit Solomon