Jury duty, health problems, and car trouble or a car accident are credible excuses for missing work. Employers cannot fire or discipline employees for serving on a jury. There are laws in most states that compel employers to recognize workers' obligations as citizens over their obligations as employees.
Health problems are the most commonly used excuses for missing work. Many companies offer sick pay and may prefer a sick employee stay at home.
Transportation problems can occur at any time without warning. Employees might have to miss work if their car breaks down or they're involved in a traffic accident.