A sample letter offering a job contingent upon the results of a background check or other criteria. In the formal offer letter, provide comprehensive details about the position, compensation, benefits, and other pertinent terms.This document, typically on company letterhead, details specific terms like job title, salary, benefits, start date, and work location. The offer letter provides general expectations and basic terms of employment if the candidate accepts the offer. Offer letters are concise documents compared to employment agreements. Offer letters contain the basic terms and conditions. Offer letters are typically short documents containing very basic terms and conditions of employment. Offer letters are typically short documents containing very basic terms and conditions of employment. An employer can use this letter when offering at-will employment to its desired candidate in Illinois. This term will likely prevent, in a dispute situation, the offer letter being construed as a contract.