While cash is the most immediate form of payment and accepted everywhere (in fact preferred in a number of cases), credit cards and traveller's checks can be an alternative. But there are pitfalls.
Passports issued to children under age 16 are valid for 5 years. Children under 16 must renew their passports in person and follow the same guidelines as when the passport was first issued, including being accompanied by parents or guardians. Two current passport-sized photos must be included with the application.
All children must apply or reapply for a U.S. passport in person at a passport agency. 1  Children under 16 need parental consent and their parents must: Be present with their children. 2  Children ages 16-17 applying for a passport can do it by themselves if they have their own identification documents.