In Canada, USA and in most of the European countries OSSD does not need to be authenticated. If your country requires authentication, please make sure to do this before you leave Canada. In order to authenticate your diploma, you will need to first get it notarized then you will need to take it to Official Documents Services (222 Jarvis St., Toronto, ON).
If you need the school to do this on your behalf, the service fee is $150.00 which includes notary & authentication fees. Note that, we use FedEx or DHL and fees will be charged on top of the service fee.