They can't be, in Poland. Polish law (and the constitution) says that children have a right to an education
Explains why people are prepared to risk cheating. I have read that there is a concerted effort to stop cheating and it's getting better, still a long way to go yet though according to people I know in Poland.
It's why employers should check their background carefully
Yes, that was one of my jobs when I was in the factory, I checked any certificates produced. Usually people were just lying or trying to pass trade school certificates off as university degrees. We soon stopped getting so many problems when it was known that I could tell the difference!!!
One case that completely threw me was a young woman who insisted she had a degree in psychology and was forever demanding an office job with better wages, ( this wouldn't have happened as her English was poor and she had no IT skills). She brought in a degree certificate from an established Polish university, subject was Psychology but she knew absolutely nothing about Psychology not even the more famous pioneers of the subject. Never did get to the bottom of that one because I couldn't get any verification from the university that she had been a student and she left the factory quite suddenly. The 'date of graduation' was 2000.