there is a credit collector agency who says I owe for att, which then sent it to another to collect. I called them because I do not recall leaving any debt owed anytime I ever used att, nor had I heard anything about this until I looked at my credit reports. They are putting it on all 3 for years now, without ever sending me a bill.
I called and they told me it was from 2001 and they did have an old phone number I used...