Turning down a job offer after you already accepted it should be done gracefully. Learn how to write a letter for declining a job offer that you have already accepted and use our template and example as a guide.Here's a template you can use for declining a job offer you already accepted due to a change in your personal circumstances. Be polite, don't make up reasons. Just tell them you regret to inform them that you can't take the position. There are many reasons for turning down a job offer, even after you've accepted it. Here's how to reject a job offer after accepting it. Make it short and sweet; "Due to unforeseen circumstances I must decline the offer I previously accepted. Learn what a withdrawal letter is, how to write a letter of withdrawal and see a template and an example to help you write your own.