<P> An aegrotat (/ ˈiːɡroʊtæt /; from Latin aegrotat, meaning' he / she is ill') or sick note is a type of medical certificate excusing a student's absence from school for reasons of illness . </P> <P> Medical certificates are sometimes required to obtain certain health benefits from an employer, to make an insurance claim, for tax purposes, or for certain legal procedures . Medical certificates are used to indicate eligibility of activity, such as the use of disabled parking . Medical certificates can also be used to describe a medical condition a person has, such as blindness . Medical certificates are often used to certify that someone is free of contagious diseases, drug addiction, mental illness, or other health issues . </P> <P> Health criteria are often required when making an application for something, such as an eye examination to get a driver's license . Other times medical criteria are presented voluntarily by an applicant in a self - assessment, without either a doctor or access to the person's medical record . Specific health criteria or medical history are required for certain jobs . </P> <P> In the United States, most aviators are required to possess a valid medical certificate that certifies sound health as part of the requirements for piloting an airplane or helicopter . While airman certificates are issued for life, the medical certificate expires and must be renewed periodically in order continue flying privileges . Sport pilots may use a valid state driver's license in place of a medical certificate, and glider and hot air balloon pilots are not required to obtain them . </P>

When is a medical certificate required for work