The call was coming from an unknown number and had called XXXX times yesterday, in increments 4 hrs apart, and again at XXXX this morning. I finally answered assuming it was important. A female caller asked for me and I said this is she. She then asked to verify my address. I asked her to identify herself and she provided her name and some random employee number but DID NOT identify where she was calling from. I asked her again WHERE she was calling from and she refused to do so. She said I am calling about an important private matter and I need to verify your information first. I told her I was NOT giving her any information until she advised where she was calling from. She refused to do so and said " thank you we will try another time '' and hung up on me. I did research online and found the number belongs to IC Systems. I am not aware of any outstanding debts at this time.