I recently submitted my N-400 packet (02/03/10). It was a USPS certified mail delivered on 02/08/10 to the Arizona office. I have not heard from USCIS since then. I noticed that quite a few of you received some form of an acknowledgment soon after turning in your N-400.
I was wondering if its something I should be worried about? I would hate to have something get lost in the mail and then miss an interview etc. Any advice would be greatly appreciated.
PS they did cash the check on 02/16/10