A few years ago I registered a domain for a project I was doing with a friend. I got an email a little bit later saying it was in dispute because a German ISP was complaining that I was infringing something. Talking to the company directly finally got me the exact reason and it turns out it was because there is a German town somewhere which is spelt the same way even though it's a word in the dictionary (urban)

If I wanted to contest it then I'd have to pay the fees to the UDRP for them to look over it. If you don't pay then you instantly lose the case. I looked into the costs and it was far to high considering it was just a random side project.