A single social media post can turn into a serious HR problem fast. Before you fire someone for what they post on social media, you need to know whether the post is protected, whether state law applies, and whether your policy actually supports the decision. Learn what to check before taking action.

Employees post about pay, workplace conditions, and company frustrations more than ever. Before you react, here's what employers need to know about when discipline is legal—and when it isn't.