Hillary Clinton’s campaign is stealing from her poorest supporters by purposefully and repeatedly overcharging them after they make what’s supposed to be a one-time small donation through her official campaign website, multiple sources tell the Observer.

The overcharges are occurring so often that the fraud department at one of the nation’s biggest banks receives up to 100 phone calls a day from Clinton’s small donors asking for refunds for unauthorized charges to their bankcards made by Clinton’s campaign. One elderly Clinton donor, who has been a victim of this fraud scheme, has filed a complaint with her state’s attorney general and a representative from the office told her that they had forwarded her case to the Federal Election Commission.

“We get up to a hundred calls a day from Hillary’s low-income supporters complaining about multiple unauthorized charges,” a source, who asked to remain anonymous for fear of job security, from the Wells Fargo fraud department told the Observer. The source claims that the Clinton campaign has been pulling this stunt since Spring of this year. The Hillary for America campaign will overcharge small donors by repeatedly charging small amounts such as $20 to the bankcards of donors who made a one-time donation. However, the Clinton campaign strategically doesn’t overcharge these donors $100 or more because the bank would then be obligated to investigate the fraud.