A Duluth woman is suing the federal government after a letter she sent to her son in Iraq was returnedWith a ``deceased'' stamp, even though the soldier is very much alive.Joan Najbar filed the lawsuit in U.S. District court in Minneapolis. She claims that she suffered emotional distress and a loss of income from the incident.Najbar sent the letter to her son in September of 2006. Several weeks later the letter was returned to her by the postal service with a red ``deceased'' stamp.Najbar contacted the Red Cross and learned her son had not been killed.Najbar filed a claim for injuries against the U.S. Postal Service in July 2008. That claim was denied.A letter from the postal service says its investigation found no negligence.