It is illegal to discriminate against anyone for being over 40 years old. That goes for hiring, firing, or promotion decisions. But, yes, it's hard to prove. En

It is illegal to discriminate against anyone for being over 40 years old. That goes for hiring, firing, or promotion decisions. But, yes, it's hard to prove. Enforcement tends to be through civil lawsuits, too, which can be hard to fund and win.