There are recent changes to the way of applying for a Canada Work Visa. Moreover, in almost every case, having a job offer is necessary. Many Canada work visas require the Labor Market Opinion. When the employer intending to hire an overseas worker gets a positive L.M.O the next step is applying for a work visa. The reciprocal treaties or transferring of senior employees, are categories of a work visa that does not require an L.M.O. The overseas national applying for the work visa must have proper credentials to perform a Canadian job. In a few cases such workers must have a practice certificate of the profession prior to applying for work visa.