The U.S. Department of Agriculture will propose new rules this Thursday that will give states the capacity to investigate food stamp recipients who seek replacement benefit cards more than three times a year. The new rules will also allow states to demand formal explanations from recipients who say they’ve lost their cards. In total, food stamp fraud costs American taxpayers around $750 million a year, equal to about 1 percent of the USDA’s total budget for SNAP (Supplemental Nutrition Assistance Program). The majority of fraud occurs when retailers allow customers to turn in their benefits cards for lesser amounts of cash. But USDA officials are also concerned about people selling or trading cards in the open market, including on the internet.