A notice period is the amount of time an employee has to work for their employer after their employment has come to an end. Depending on who is ending the employment relationship, notice periods give the employee or the employer advance notice that the employee will be leaving their job.
Reasons for giving notice
When employment comes to an end, it's normally necessary to provide notice, either to the employee or employer (depending on who is ending the employment). The two main exceptions to this are in the case of gross misconduct and if a fixed-term employment contract reaches its conclusion.
If an employee decides to take up a new job or leave their current employment on good terms (ie where there is no employment dispute), they should submit a Resignation letter and work out their notice period.