Offer letter or an employment offer letter is a letter which is handed to the person who is being hired by the company with all the terms and conditions mentioned in it. This letter briefly describes the position for which a person is being hired, location of the job, starting date, salary and other information related to the job. It is customary for a candidate accepting the job offer to sign a copy of the letter and return the same to the employer within the time period mentioned in the job offer letter. These letters are printed on the letterhead of the company and are signed by the manager or the HR of the company.