A Don't be tempted to sweep this complaint under the rug. As with other complaints, you have an obligation to investigate a former employee's claims. The individual who allegedly harassed your former employee may be harassing others, so you need to investigate and stop any wrongful conduct. ?Moreover, the former employee may still sue the company, and you need to be prepared. One way to prepare is to investigate promptly and thoroughly after you've received the complaint. The company's failure to do so would surely be used against it in litigation.