You have zero legal obligation to go to any job, except in very rare circumstances. You can be hired or quit at any time.How can a person accept an offer letter without knowing any details of the organisation? 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. Writing a job acceptance letter is a sign of professionalism. Check out these job acceptance letter samples to write a perfect acceptance letter I accepted a job offer through an email but I have not yet signed the contract. Is it possible to back out of the job. A sample letter offering a job contingent upon the results of a background check or other criteria. Many things in life are a negotiation and this is one of them.