MIAMI — The Miami-Dade Police Benevolence Association hopes a plan to offer $10,000 rewards for tips leading to voter-fraud convictions will put the kibosh on phony absentee ballot schemes that have plagued Miami-Dade’s political races for years.

“We decided to do this because absentee ballot fraud has been in this community for years and nothing has happened,” said Blanca Torrents Greenwood, executive director of the group. “We thought, let’s do this to see if we get results.”

The announcement came a day before the Miami-Dade Elections Department started mass mailings of absentee ballots for the Aug. 26 primary election.