PUBLIC DOCUMENTS

I have been getting many phone calls today, one was from my mother to motivate me to get on my treadmill which I very much appreciated and other phone calls were from different companies for numerous reasons and it left me wondering where and how are they getting my information? I know it is there job to make these phone calls and I was once doing this for a job years back and even then I wondered where the list came from. The lists can be made up from many different public documents through a list broker. So whether it's from a phone book, license, advertising directory, they can get access to your information.