You must inform the Agent that you are using a passport agency to expedite the processing and that the sealed documents will be hand-delivered to the Department of State. This Department of State policy is called "Hand Carrying of Executed Applications". The policy is detailed on pages 31 and 44 of the acceptance agent Manual.
The acceptance agent should write the applicant's name, departure date, and date of birth on the outside of the sealed envelope. If two or more applications are sealed in the same envelope please make sure that the information about both applicants is written on the envelope.All minors must appear in person.
For more information on how to apply for minors
(under 16), please read U.S. passport requirements for minors
The acceptance agent will return sealed envelope to you. Do not open the envelope. Mail in sealed envelope along with remaining paperwork to Keyflight for the processing of your new passport.