Use these sample letters for declining a job offer as a starting point to fill in your details. Whether you accept an offer or decline it, you should do so in a gracious, professional and timely manner.This blog post will teach you how to turn down a job offer with 15 examples and templates that will make declining a job offer an ease. You may complete an on-line application at the Contra Costa Human Resources Department at 651 Pine St., 2nd Floor, Martinez, CA 94553. Here's a sample letter to decline a job offer for your reference to politely say no to the company when you have made up your mind to join another. Declining a job offer is hard to do because you worked hard to get it and there is still a moment of hesitation whether the choice is right. Thank you so much for the job offer! I sincerely appreciate the time and effort you and your team have invested in the interview process. The Contra Costa County Office of the Sheriff is recruiting to fill Detention Services Worker vacancies. Appointments may be up to 24 months.