Learn how to write a professional job offer letter acceptance mail reply with joining date with an easy format and practical samples. The starting paragraph should always begin with your acceptance of the job offer letter.A job acceptance letter lets you outline the details of the job so that you are clear about your role in the company prior to your joining. 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. I am delighted to accept your offer and very excited to begin this journey. By signing and returning this letter you will confirm your acceptance of the offer. Please respond no later than July 1st, 2019. Your job offer letter should also include the start date or date of joining. If they are saying they cannot issue the offer letter unless you give them a joining date (i.