What documents does my daughter need to send with her passport for a Thai Tourist visa application?

A user is seeking clarification on the required documents for mailing her daughter's passport to the Thai Consulate in Chicago for a Tourist visa application. While she initially mentions needing just the passport, two photos, and e-appointment registration, other commenters suggest checking the embassy website for a more detailed list, including the necessity for a barcoded page and a self-addressed envelope with return postage.