Christopher Marconi was in the shower when he heard a loud banging on his door. By the time he grabbed a towel and hustled to his front step, a U.S. marshal's sedan was peeling out of his driveway. Nailed to Marconi's front door was a foreclosure summons from Wells Fargo, naming him as a defendant. But the notice was for a house Marconi had never seen - on a mortgage he never had.