Is it legal to have an employee sign an agreement stating a retirement date? We have an employee who is permanent part-time (32hr week). He is 67 years of age and gives us a retirement date but as soon as it get close to the date, he says he wants to stay for another 6 months. This is all verbal. We are aware that retirement cannot be forced on an employee as this would amount to age discrimination, but if there is a written agreement in place, signed by both the employee and employer, will this be legal under employment law? Thank you in advance.