I am mostly curious about qualified candidates that cannot prove their skill, because they cannot get it to the interview.
I'm a developer, but the question is not focused on IT. I've had two cases to be curious about this topic.
One time I got a refusal to attend an interview from a recruiter, because I had 2.5 years' of experience with certain technology, but they searched for somebody with 3+ years. But in my opinion it does not even qualify the skill in that particular field, because one can work on side-project for 4 hours a week for 5 years with that technology: that is far less experience in comparison to somebody, who worked a full-time job, plus a part-time job, plus some courses for 2 years.
Another case is I was refused an interview was because I haven't got a bachelor's degree. But on the other side, I have almost 4 years of employment in industry and chances are my qualification would probably suit the position.
My guess is that some positions require a certain type of degree by law, but is it the case for all positions and does it even happens often?
I'm residing in Ukraine and these were Ukrainian companies, but it is generally interesting about laws for such cases in different countries.