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.How to Write an Acceptance Letter for a Job Offer? Explain that you accepted a job offer, that the acceptance was in writing, and say who sent you the offer. I signed an offer letter and passed a background check then gave my notice. I was not expecting my company to counter in the way that they did. Fill out the complaint form, answering all of the questions completely. Job responsibilities have significantly changed in a current position. Is a previous employer letter required from all previous employers for an I-140 filling? If you have been previously postponed or absent, any request made through this system will NOT be honored.