Most applicants who are age 1617 must apply in person using Form DS11. Passports for applicants 16 and older are valid for 10 years.Notice to Applicants Ages 16 and 17: At least one of your parent(s) or legal guardian(s) must know that you are applying for a U.S. passport. All Applicants Must. Submit a completed Form DS 11. Find out how to apply for or renew a passport for an adult or a minor under 18. Know what to do if a passport is lost or stolen. Passports for all minors under 16 and those aged 16 or 17 who cannot have both legal guardians present. Step 1: Complete the form DS-11 . Complete the form online, and then print it.