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. Use these sample letters for declining a job offer as a starting point to fill in your details.One key is being polite at all times throughout the process. Turning down a job offer after you already accepted it should be done gracefully. Check out our template and example for professionally declining a job offer you already accepted, and prepare your own whenever you need it. Below, you'll find six tips for how to say no to a job offer while leaving yourself in good standing with a hiring manager.