You will need to bring your child’s U.S. Birth Certificate or Consular Report of Birth Abroad (CBRA), parents’ photo identifications, proof that parents are related to the child, online passport application using the “Passport Wizard” ( https://pptform.state.gov/), passport photo, and fee of $105.
For applicants age 15 or younger, both parents must appear in person and sign the passport application before a U.S. consular officer. Please schedule an appointment at the Embassy’s appointment page: https://kr.usembassy.gov/u-s-citizen-services/make-an-appointment/
For more information see: https://kr.usembassy.gov/u-s-citizen-services/passports/minor-passport/