Here is another question.
Say, I move to Topeka, Kansas right around April 1, 2010. Will they send the Census form to my Oklahoma address or my Kansas address, or both? Would I be held responsible for both forms? I assume I would put down where I am living on April 1, 2010 whether that's Midwest City, Oklahoma or Topeka, Kansas, but I was just wondering how they would know where I live, especially if I file my change of address with the USPS on, say, March 31.
The Census employs an army of enumerators to follow up on forms that they believe were not completed. If a form did not come in from either the OK or KS address, an enumerator would have that added to their followup list.