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. Explore Offer of employment Canada Forms and find the form that suits your needs. Hiring employees in Canada? Employment Offer Letter Instructions. An Employment Offer Letter provides the employer with an opportunity to formally make an employment offer to an employee in a clear and concise fashion. It may include information on start date, working hours, salary, bonuses, vacation, probation period, and numerous other details. An Employment Offer Letter provides the employer with an opportunity to formally make an employment offer to an employee in a clear and concise fashion.