Four to six months before your planned move, fill out an
Official Change of Address Form online. You also can pick up a kit at your local U.S. Post Office. Be sure to fill out a form for each person or company that you want to notify of your move. If you're unsure what your new address will be, ask your postmaster to forward your mail to Jacksonville's General Delivery facility, 1100 Kings Road., Jacksonville, FL 32203. This facility will hold your mail up to 30 days. You can pick it up at any of the facility's retail windows.