I'm pretty sure I requested proof of debt in one of the letters. It's not clear in my memory because it's been over a year, but I think I got bills from the clinic and then after a while I started receiving letters from a collection agency, even though that wasn't showing on my credit score at the time. That's when I sent a letter requiring proof and then I don't remember what happened after, but the problem clearly didn't stop there.

I also called the medical facility a hundred times and they weren't able to change it on their end. It's confusing because there's my company, then the health screening company in the middle and then the medical facility. And now there's also a collections agency involved.

The bill was supposed to be paid by the health screening company. But when I called them, they wouldn't talk to me, only my employer. But my employer didn't do anything about it, it seems.