As of 2014, the requirements for an adult to obtain a U.S. passport are a completed Form DS-11, evidence of U.S. citizenship, proof of identity, payment of the application fee and a submission of a passport photo. Additional requirements are necessary for a person under the age of 18.
Applicants under 16 must provide evidence of U.S. citizenship, parental consent, photo identification and evidence of the parental relationship. Those who are 16 or 17 must have a naturalization certificate, a U.S. birth certificate, a certificate of citizenship and photo identification. Applicants outside the U.S. have a different application process from U.S.-based applicants but use the same application forms.