No statute or regulation explained who had the burden of proof when Ayesha Chaudhary challenged a determination by the Illinois Department of Human Services that she allegedly received $21,821 in overpayments under the Supplemental Nutrition Assistance Program.An administrative law judge ruled that the burden belonged to Chaudhary and that she failed to prove there was no overpayment. Chaudhary countered by going to court with a writ of certiorari, and a DuPage County judge reversed. “The department had the burden of proof …