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 want to submit an offer of employment. If the offer letter is an email, employers can put this information in the subject line. Your Canada job offer should be written on official company letterhead with contact information, including registration and contact number. Generally, the employer who wishes to hire you must be the one to submit the offer of employment letter in the Employer Portal. If you received your offer letter via email, you can reply with your acceptance. I am a canadian citizen with a job offer from the usa, how long would it take for me to get a us work visa?