You'll need also a Letter of employment for the time you were working for your employer, including NOC, Salary, duties, dates and worked hours. An offer letter provides a brief overview of the position and company and includes specific job details, such as start date, salary, work schedule and benefits.A job offer letter is a document that a Canadian employer gives you (as a temporary worker). It explains the details of your job. Learn everything about job offer letters for immigration, including eligibility criteria, required documents, and the process. We've drafted templates of job offer letters for your use. You can download a research position offer letter here, and a teaching position offer letter here. This job offer is extended to you for immigration purposes, to portray the legitimacy of your reason for entering the country. Find out job offer requirements for Express Entry and who needs a Labour Market Impact Assessment (LMIA).