You have two options when changing your address after a move. You can either go to your local post office or change your address online. When you go to the post office, request a Mover's Guide packet, and fill out the PS Form 3575. After either putting it in the mail or giving it to an employee, you should receive confirmation in the mail in about five business days. To change your address online, go to USPS.com/move and fill out the form. You will receive an email confirming the change. This is the fastest and easiest way, but there is a $1 charge.