A job offer letter is a document that a Canadian employer gives you (as a temporary worker). It explains the details of your job.I'm planning to submit my PGWP application soon but can't seem to figure out where I can upload my job offer letter in my application. In most cases, the employer must send you: the written job offer and a Labour Market Impact Assessment (LMIA) number when applying abroad. If you wish to obtain a job offer from an employer in Canada, the best option is to immigrate on a Permanent Resident Visa. Application Deadlines. ISSO reviews applications in the order they are received once all supporting documents and test scores are complete. Getting a letter of employment from a Canadian business might significantly impact your chances of being granted Permanent Residency (PR). The Postal Service is actively hiring for full time, part time and seasonal employment. Termination clauses lay out how an employer and an employee can end the relationship.