A:If you plan to use your passport as proof of citizenship and identity it must by valid. Expired passports are not accepted. There are other document that are accepted such as a Trusted Traveler Cards (NEXUS, SENTRI, or FAST) or State Issued Enhanced Driver's License. U.S. citizens who need to obtain a passport within 14 days can either visit a regional passport agency (by appointment only) or contract a passport expediter.