How long it takes to receive the job offer letter from the City of Los Angeles Departments? A simple "thank you for the offer" can go a long way.We've compiled a definitive guide, made up of all of the key, important questions to ask, in order to cover an all-encompassing range of integral bases. The offer letter represents what the employer is choosing to offer for the position. It is therefore wildly inappropriate for you to modify it. The answer to your question, regarding whether you can back out of the Offer Letter, is likely "Yes. Here is a sample acceptance letter that you would print out and send through the mail. Be sure to print on quality white paper. Can I submit my resume instead of completing all sections of the City application for Civil Service exams? Contact the employer who has made you the offer and ask if they are prepared and willing to extend the offer acceptance deadline, if needed.