The Orlando (Fla.) Sentinel said Tuesday that Anthony, 23, is being sued by Zenaida Gonzalez of Kissimmee, Fla., who alleges Anthony damaged her reputation by naming her as a suspect in the 2-year-old's disappearance in July 2008.
Anthony reportedly told investigators she left her daughter with a babysitter named Zenaida Fernandez Gonzalez the day of her disappearance.
The body of Caylee was found in December in Orange County, Fla., leading to first-degree murder and aggravated child abuse charges against her mother.
Anthony's attorneys sought a dismissal of the civil case against their client, but Orange County Circuit Judge Jose R. Rodriguez rejected that proposal Monday.
The Sentinel said Gonzalez is seeking more than $15,000 in damages in her lawsuit.