Post Office™. Share. Use our online form to answer a few questions about your issue.Please provide as much detail as you can. Are you a victim or have you witnessed a mail-related crime? Alert Postal Inspectors to the problem and prevent others from being victimized. A homeless person may submit an application for PO Box™ service to a local Post Office™. The Postmaster may approve the application under certain conditions. Our form wizard will help you and your family know what passport form(s) to use. Mail Services sorts and distributes incoming and outgoing U.S. mail and interdepartmental mail and operates two licensed U.S. Postal Service post offices. Post Office Box 5616.