No, with a lot of companies, you can make up phoney jobs on your application because they don't check usually. I wouldn't personally, because I know with my luck they'd try to contact each and every one of them.
Guessing they didn't like him there. I had that happen to me once. Just had them call a friend that I made there instead. It sucks but that's the way some people work. When I was supervising I always called and verified that stuff on atleast 3 employers. Can't say anything else other than yes or no, but they will also ask would you re-hire them. But if he made any friends there that he is still in contact with just have him use him as a reference.
I've answered the employment verification question yes or no many times.That's what law requires and all HR wants,for legal reasons.On one employee,who robbed me blind,I did reply,"If you call embezzlement work,yes he did." POS cost me a five grand bonus.