If your application is approved you will be issued a Letter of Introduction. The Letter of Introduction will be sent to you by email. You should NOT book/pay for any travel to Canada, purchase insurance for your stay in Canada, or make commitments to your prospective employer in Canada (if you have one) until you receive your Letter of Introduction.
The Letter of Introduction (LOI) is not your work permit -- rather, it identifies you to the port of entry as being eligible to receive a work permit. As such, you must be sure to present the LOI to a port of entry officer when arriving in Canada. Your LOI is valid for 12 months from date of issue. If you had undergone a medical exam with one of our designated medical practitioners as part of your WHP application, your LOI will be valid for 12 months from the date of the medical examination. The last date on which you can present the LOI at a port of entry to Canada and receive a work permit is indicated on the LOI.
Eg. If you are issued with a LOI on the 1st of March 2010, you would have to enter Canada before March 1, 2011. Upon your entry to Canada, when you present this letter, the Port of Entry Officer has the discretion to grant you up to 24 months on your working holiday work permit. NOTE: work permits may not be issued to exceed the validity of your passport. As such, be sure that your passport is valid beyond the period of time you wish to work in Canada.
The issuance of your Letter of Introduction completes processing of your application at the Consulate General of Canada in Sydney.