eeoc

EEOC: Age Discrimination

What the ADEA actually protects, what employers may and may not ask, and how to file if a line is crossed.

In plain terms: This guide explains federal rules protecting workers and job seekers age 40 and older from age discrimination. You can use it to recognize illegal workplace practices, check reporting deadlines, and learn how to file a complaint.

Why I recommend it: Know the line. Most age bias is not illegal questioning, but it helps to recognize when it is.