President Barack Obama’s 2012 campaign has hundreds of thousands of eager, low-dollar donors — and a tiny trickle of unwilling, defrauded donors.

The latest example comes from David Newman, who found a $15 charge, dated May 6, from the “Obama For America” campaign on one of his debit cards.

Newman had supported Obama in 2008, but “I didn’t sign up to say ‘Do this every three months or every three years when you need money,’” he told The Daily Caller.

“This is completely 100 percent unauthorized,” said Newman, an information technology specialist. The money has since been returned by Bank of America, and the debit card has been cancelled, he said.

Newman’s example follows the publication of two examples of small-scale fraud by Powerline, a conservative blog. For example, “Bill G” told Powerline that he had found a $10 charge to “Obama for America” a few weeks after someone had secretly changed his address in the bank’s database.