Ahead of today’s primary elections, voters in a suburban Westchester County town opened their mailboxes to find a harsh attack on its top local elected official.

Harrison Supervisor and Mayor Richard Dionisio, who is facing challenges in the Republican, Democratic and Conservative Party primaries — he’s running for all three lines — is “The Most Corrupt Man in NY,” the mailer told voters, alongside a large photo of a recent New York Focus article. (Last month, New York Focus reported on Dionisio’s financial windfall following a controversial rezoning he helped push through.)

Yet the source of the funding behind the mailer is itself murky.

In the past year, New York’s top financial officer has urged at least three private equity firms responsible for investing billions of state pension dollars to stop anti-union activities among their portfolio companies, according to records obtained by New York Focus.

Andrew Cuomo has centered his mayoral campaign on affordability, arguing that his experience in government has equipped him to bring down the cost of living in New York City.

His campaign cites as examples his achievements as governor, like raising the minimum wage and slashing taxes.

But the result of one affordability-centered episode from his time as New York’s attorney general has never received public attention: his pledge to protect 100,000 New Yorkers who had been victimized by shady debt collectors.

In July 2009, he launched a lawsuit on behalf of a judge to recover up to $550 million from collection firms that, he alleged, had violated basic due process rights by filing lawsuits against consumers without legally notifying them.

Cuomo called his lawsuit a “key step in our efforts to uproot unlawful debt collection practices.” He asked a judge to toss out the faulty cases and direct “proper restitution” to any debtor who made payment on an “improperly obtained default judgement.” His office estimated that the average default judgement was around $5,500.

In the end, very few of the cases were tossed out, and even fewer consumers got their money back.

Carolyn Coffey, a career consumers’ rights attorney, remembered praising Cuomo at the time for taking action against the “devastating effects” of fraudulent debt collection and sewer service.

But when his office unveiled the settlement, Coffey was “absolutely horrified,” she told New York Focus.

“It was a complete pass” for the debt collectors Cuomo had promised to hold accountable, she said.