How To Write Interview To Reject A Job Offer . Say thank you for the offer. It’s our decision to go ahead with other candidates, but we thank you for taking the time to let us. Regrets Letter After Interview Collection Letter Template Collection from simpleartifact.com I would like to inform you that we have filled the position. See the example of turning down a job offer after accepting below. If you can't think of a specific reason, then you can simply say that it is not a good fit for you at the moment.