One time I moved, one of my credit cards didnt change the billing address, and for over 6 months I would send them the correct address with my payment. After resorting to sending them a dollar payment and stapling the check to the bill (and we talking a LOT of staples) they never did. Those checks cleared my account too. When the post office stopped forwarding my old mail, they still didnt get the new address off the returned bills. When they turned it over to collections, who by the way, sent their notice to the right address did it ever get straightened out.