Almaamounito - as far as i know, they send region by region, but that can't be a solid answer, this is just speculations and people experience.
This year i believe KCC will have a website where you can check if you won or not, so keep praying.
Khaled - since you are doing a CP then you should send all the document you received to the KCC. use a new envelope and use the label they printed.
and for shipping i would use either TNT or FedEx, since you can track those and make sure they are delivered.