Employment Offer Letter Instructions. Start a job offer letter with "Dear" and the candidate's first and last name.Let them know that your company is enthusiastic about the job offer. A sample letter offering a job contingent upon the results of a background check or other criteria. 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. What should be included in a job offer letter? New Hire Paperwork for Illinois includes filing of federal and state forms. They are W-4, IL-W-4, I-9 and WOTC. Trend: More states are requiring notices and disclosures prior to the start of employment. The offer letter is the best place to include those.