Employment Offer Letter Instructions. You can't consider it as an offer letter as its only a break up of your salary components that you will receive in your monthly salary.Need help drafting a job offer letter? Offer letters must be prepared to preserve at-will employment status unless the employer consciously decides otherwise. See Preserving At-Will Status. Specify the salary or hourly rate, including details about payment frequency and method. Learn how to write a salary verification letter and review a template, examples and tips to help you get started on writing your own.