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. 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.A job offer letter is a document that a Canadian employer gives you (as a temporary worker). It explains the details of your job. Hiring employees in Canada? A job offer letter from a Canadian employer is a crucial document for obtaining a work permit and potentially immigrating to Canada. Find out job offer requirements for Express Entry and who needs a Labour Market Impact Assessment (LMIA). Need to provide proof of employment status? Use this sample employment verification letter to create your own. If you wish to obtain a job offer from an employer in Canada, the best option is to immigrate on a Permanent Resident Visa.