Virginia Tech's Career Services Center recommends that people accepting job offers should make a phone call to their job search contact person and make a verbal acceptance. They should follow up with an emailed or hard copy letter of formal acceptance.
Whether email or a printed letter is used varies on the pattern of communications and the nature of the employer. Next, people should stop their other job searches and notify other interested employers that they have accepted a position elsewhere.
Virginia Tech recommends that before people accept a job offer, they should be definite it is what
they want. Changing their minds later and backing out is unethical and can hurt future job chances.