I have just recently had experience with cba collection bureau and for a similar reason. This company has been sending me collection notices for a supposed debt to Comcast. However, every time I speak to someone at Comcast they say I have a balance of $0 on my account at the previous address. They also have told me they don't send their accounts out to a collection agency. They do the collections within their own company. I called the phone # on the collections bill and the man who answered didn't even sound like a professional business. He answered by saying "Hello, uh I mean, Collections, Collection Bureau... can I help you?" That's an exact quote. Doesn't sound like a real collection agency to me. And, when I told him he was mistaken and that I do not owe Comcast any money and I would not be paying this bill he sent, he said "Well, whatever." and hung up on me. Anyone receiving a bill from cba collection bureau should report them to the Better Business Bureau without sending them money.