Once you apply successfully online, a declaration letter with a checklist is generated. It mentions that following things are required :
1. The original Declaration, commitments and authorizations form, dated and signed.
2. An original recent ID photo, passport format (35 mm x 45 mm), with your name on the back and
stapled in the box opposite.
3. Legible photocopy of pages of your passport bearing personal information and the photo (well
defined). Your passport must be valid.
4. Letter of admission from the registrar (or Admissions Office) of the educational establishment that you will attend.
Although its not mentioned, but add the Credit Card payment receipt too.
Don't worry much about CAQ. Its a pretty easy and straightforward process.