Every notice of default has a signature on it. But just like the infamously rubber-stamped affidavits in the robo-signing cases, default notices, in at least some instances, have been signed by employees who did not verify the information in them, court papers show. In several lawsuits filed in nonjudicial states, borrower attorneys are arguing that this is grounds to stop a foreclosure. "Whoever signs the NOD needs to have knowledge that there is in fact a default," said Christopher Peterson, an associate dean and law professor at the University of Utah.