Register to WES on http://www.wes.org/ca/application/apply_now.asp (Choose FSWP Credential Assessment as it selected International Courier and not the Standard Mail)
International Courier can be tracked and reach within 3 days...Standard Mail: slow like snail.
Once you are done with registration, you will get a WES Reference Number.
Send your Documents to WES as soon as possible and don't forget to write your WES Reference Number on the envelope, as this is how they track your documents fastly.
To check 'Required Documents by WES from your country': please check http://www.wes.org/required/index.asp