Keep a copy of your acceptance letter for your files. Which, like you said, hasn't been signed.In the formal offer letter, provide comprehensive details about the position, compensation, benefits, and other pertinent terms. Just rely to the email. It's a legal concept that offers should be extended, and then accepted. Job Offer Acceptance Letter Congratulations if you've made it to this stage in the job search! This letter is sent to an employer when an offer has been made. I am excited to join the team and accept your offer. When applying, be sure to customize your cover letter and resume to fit the job description and employer's needs. Response letters will be sent to all applicants, either via email or US mail, once a candidate has been chosen for the position.