Giving a timely response is the most polite. The quicker you respond, the quicker the employer can fill the role.State that you were disappointed, but congratulate the hiring person(s) on having made a selection, and then wish them well. 1. Let your employer know as soon as possible. Avoid letting your employer wait too long. The short answer is yes, you can decline the offer. I suspect that the offer letter says that when you become employed, you would be an employee at will. This post will cover how to write job rejection emails that impress applicants and reflect well on your company culture and overall image. Decline a job offer politely with our job offer rejection letter template. Say no gracefully and maintain a positive relationship.