Yes, if your passport application is denied, the issuing authority (such as the U.S. Department of State) is legally required to send you a formal written notification, usually via mail. This letter will explicitly state that your application was "rejected" or "denied" and will provide the specific legal grounds for the decision. Common reasons include unpaid child support, outstanding federal warrants, being on parole, or having an incorrect Social Security number. In many cases, you might receive a "Letter of Suspension" instead of an outright denial; this means they need more information, such as a clearer birth certificate or a better photo, before they can proceed. If the denial is final, the letter will also outline your rights to appeal the decision or the steps you must take to resolve the underlying issue (e.g., paying off a tax debt) before you can reapply. In 2026, you can also track your status online through the official passport portal, which will show a "Status Update" if a letter has been dispatched. They will not simply ignore your application; you will always receive a clear explanation for why a passport cannot be issued to you.