My mother and father both went to their interviews on July/12/2011 at the same time, by different officials. My mother received her decision that same day and took her oath. My father however was told he passed the tests, yet a decision could not be made and they would notify him of a decision by mail. It is now 11/04/2012 and he has not received anything stating a decision or requesting any additional information. We keep trying to call but we can never reach someone and we've tried to go online but we need a "receipt number", which we cant find anywhere in his paperwork. What could be causing such a long delay and what do we need to do to get a decision? Can such a long time period cause him to have start this process all over again?