Learn how to write a professional job offer letter acceptance mail reply with joining date with an easy format and practical samples. 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.There are 7 acceptance letter samples you will see here. They can be used for different purposes. Learn why you must write a job acceptance letter and how to write one with a professional touch through our tips and free samples. But if you do back out, I'd strongly presume you won't ever get another job offer from that firm. Apply to multiple SUNY campuses and submit any additional required documents all in one place. Create your best resume yet.