Say goodbye, but not good riddance. You may still have a use for those ex-employees.
Used to be that when employees quit, they were considered traitors and told to clean out their desks on the spot. No more. Today, the split is usually amicable; going-away lunches and gifts are common. And it doesn't always end there. When a valued employee leaves your company, there are several reasons to keep in touch.
Former employees who stay in contact with their old bosses will tell others what a good employer you are and what a great place your company is to work at. That kind of person-to-person advertising can bring you more business and help you recruit new employees. The potential for former employees to return later with more skills and experience is another benefit of alumni programs.