A notice period or period of notice within a contract may by defined within the contract itself, or subject to a condition of reasonableness. In an employment contract, a notice period is a period between the receipt of the letter of dismissal and the end of the last working day. This time period does not have to be given to an employee by their employer before their employment ends. The term also refers to the period between a termination date or resignation date and the last working day in the company when an employee leaves or when a contract ends.