I genuinely don't get it. Debt doesn't just appear. You get it because you buy things you can't afford.
Yes, unless you're the victim of identity theft, you seriously deserve thereaction for the question " How do I know which companies I owe money to?"
Exactly.
You pay the companies you borrowed from. You have a lot of credit card debt? Pay the credit card company(ies). A large student loan? Pay the bank that gave you the loan. Did you fail to pay your utilities for a long time? Pay the power company.
No, you don't. You're wrong and thinking too short-term and simplistically.
Once a debt goes into collection, it is often sold to other companies. This happened to me. In college, aka the late 90's, I had a credit card with MBNA, which I stopped using, cut up, and paid way down. I was in college, and was not a super-responsible money manager and I did not keep records of these things and really didn't know or care how much was left. When I moved, I sent them an address update, but they never sent me another bill, so I assumed I had paid it off and went on my merry way. Five years later, I got a letter from some law office/collection agency saying that they had bought my debt from MBNA and I owned the money to them. They never responded to my inquiries, so again, I moved on. This phantom debt has now been passed through at least 4 companies. If I called MBNA today to find out about this, they wouldn't be able to a) take my money or b) tell me who to contact. And I would have some random listing for a company I've probably never heard of on my credit report.
It's not as fucking straight forward as you assume it is once a good number of years have passed and the debt has been sold around. If you've not had any long-term debt problems, then you really don't know what you're talking about.