A job offer letter is a document that a Canadian employer gives you (as a temporary worker). It explains the details of your job.In most cases, the employer must send you: the written job offer and a Labour Market Impact Assessment (LMIA) number when applying abroad. Your offer letter should include your name and date of employment. Canada job offer letter checklist. Position (job title), job description, start date, and probationary period. If you wish to obtain a job offer from an employer in Canada, the best option is to immigrate on a Permanent Resident Visa. Fill out an application online. Upload your resume to automatically fill in some information. I'm Allie, your virtual job assistant at Aramark!