Courtesy dictates that you acknowledge a written job offer, even if you are not ready to accept or decline it. Take note of the details of the offer.A counter offer letter is a physical letter or email candidates send to an employer when they want to negotiate the terms of a job offer given to them. Looking for job offer letter samples? Explore 10 free job offer letter templates suitable for various hiring situations. The hiring manager and the dean will be required to approve the offer details before the offer letter is generated. In the opening paragraph, thank the recipient for considering you for the position and sending a job offer. I am writing to confirm my acceptance of your employment offer on April 20 and to tell you how delighted I am to be joining XYZ Corporation in Chicago.