There is no one way to get a doctor's note for work or for school, but the best method is to visit the doctor while sick and to ask for a note, according to Business Insider and the Toronto Star. Doctor's note policies vary.
Each doctor's office, workplace and school has its own policy on sick notes. However, it is important for individuals who are ill to stay at home. People who go to work sick are less productive and expose other workers to their illnesses, notes WebMD. Studies have shown that employers lose more money when employees come to work sick and perform at a lower capacity instead of staying at home to rest.