I believe the Certificate/License is if you hold a CNA, psych tech, ect. license so if you do not have one I would leave it blank. I left the "All Official Transcripts" part blank because I am also confused on what to put there but I have an appt on the 7th and I will ask the counselor. If you go drop it off at the post office they will postmark it with that days date. They just want it postmarked by the 17th.