This is a collection agency for AT&T. They will pester you until you pay them. I don't even have AT&T and I'm tempted to pay them just to get them off my back -- but then the man (with a heavy accent) told me I would need to "call the AT&T to let them know you paid." What will happen if I don't? Will another collection agency start bothering me? Not sure whether this is just an error or what the problem is, but even though I don't have AT&T, this man knew ALL of my personal information -- asked me to verify my SSN, my address, my DOB, and so on... which he had. Scary.