A sample letter offering a job contingent upon the results of a background check or other criteria. You must indicate that you will be joining duty on the particular date in line with the offer letter.When accepting a job offer, let the company know you are grateful they took time out of their busy schedule to offer you a job. Learn how to write a professional job offer letter acceptance mail reply with joining date with an easy format and practical samples. Include a space where the potential employee can sign and date the letter to signify their acceptance. You will need to provide the dates of employment and the names of all companies for whom you have worked, if any, since you last claimed unemployment benefits. Include a space where the potential employee can sign and date the letter to signify their acceptance. Application Process - Starting Out. How do I apply for a job? I am delighted to accept your offer and look forward to commencing work with your company from {Date}.