What is included in an offer letter? While an offer letter isn't a contract, the employer is legally obligated to pay the wages on offer letter until they notified OP of the change.Legally you shouldn't. But even if you share it is not much of harm. An offer letter provides crucial details about the role, including salary, benefits, and start date, setting the foundation for the employment relationship. What is a job offer letter? Offer letters should include the employee's start date; job title; name or title of immediate supervisor; whether the position is fulltime or parttime. I was sent an offer letter for salary. Clearly state the job title and position being offered. For example, quoting an "annual" salary might make you liable to pay out the full amount in the case of early termination.