I have a different point of view, I did all that in mid October 2004, then got confirmation letter, and everything was apparently ok. In december I asked my congressman to send and inquiry and to check if the address was register, I got congressman response that new address was acknowledge, well in Feb 2005 I got my FP notice sent to my old address, my cousin is living in that house so it was not a major issue for me. Went to get FP and I talked to the officer about the address, and showed him my address confirmation letter, and he told me THAT'S NOT THE SAME, and that he would fix it. As you can see TSC hates me, but I think this only happens to the "lucky ones" like me, just take my experience, if there is any problem it won't be critical, but it will bother a little.