AFP or licensors Facebook has been accused of age discrimination over job adverts
Facebook itself posted an advert for jobs in its engineering department with only people aged 21 to 55 able to see it.
Delivery firm UPS was found to have targeted an ad for part-time package handlers at those aged 18 to 24.
Other employers confirmed they would change recruiting policies after the age-related posts emerged.
Amazon said it had reviewed its advert delivery on Facebook and found it was “inconsistent with our approach of searching for any candidate over 18”.