Can an employer legally withdraw a prospective employee's job offer? In short, the answer is yes.An employer may only rescind an offer if they can determinate a reasonable relationship between the job and the need to deny based on a criminal record. Be polite, don't make up reasons. Just tell them you regret to inform them that you can't take the position. An employer has the power to rescind job offers for various reasons. This can happen even after an employee has already accepted the offer. Revoking an employment offer is not illegal in most cases, but the decision should be given a full legal review before contacting the candidate. Yes, an offer letter can be withdrawn. You don't have to go through with it.