The act of informing an employer about an absence from work due to illness via a written message constitutes a formal notification. For example, an employee unable to attend work because of a medical condition might send a message to their manager detailing the reason for their absence and expected duration.
This method of communication offers several advantages, including providing a written record of the notification and allowing for efficient dissemination of information, particularly when direct phone contact is impractical or unavailable. Historically, such notifications were primarily conducted via telephone, but the increasing prevalence of mobile devices has made the text message a common and accepted alternative.