"If an employee reached out to me to ask about vacation payout at termination or any other aspect of termination, it would raise an immediate red flag for me. The employee most likely has either already put in their notice, or they are getting ready to. I would provide the employee with the information they requested, but I would also pass the information along. I would notify my HR manager and the employee's manager that it seems like they might be getting ready to put in their notice. This would give the company an opportunity to talk with the employee before they quit to see why they want to leave the company and if there is anything we can do to change their mind."