As soon as the letter of offer/invitation is received, the postdoctoral fellow must apply for a temporary work permit and where appropriate, a temporary resident visa, from the nearest Canadian Immigration Office. If the individual is a citizen of a visa-exempt country, s/he may be required to apply for an electronic travel authorization prior to boarding a flight to Canada. The application process can take up to several weeks. Visit the website for your local Canadian Immigration Office to confirm processing times, fees and required documentation.
A temporary work permit will normally be issued for the dates outlined in the letter of invitation. However, there are other factors, such as passport expiry date, which the immigration officer will take into consideration when issuing a work permit.