i work as an att cust service rep and all day long people are calling about these "third party" charges. it happens to so many people and they don't realize it because they charge smaller amounts.
when i ask supervisors about it they say there's nothing we can do. i think it's because those companies are really part of att. how it works is when you get one of these on your bill, you have to call them and they send att the credit to be put on your bill. that is if you can get through to those other companies.
then it can take 2 to 3 billing cycles to show up on your bill.
anyway, if you're an att cust, always keep an eye on the first page of your bill at the section titled "billing summary". the 3 most common third party companies you'll see are USBI, OAN, and ILD.
Monetary Loss: $15.