My 16 year old sister was at the door to our home ...

My 16 year old sister was at the door to our home when these cockroaches rang the bell. The identified themselves to her as somebody "from the gas company". Asked her to sign a few papers since the home owner wasn't around. She said no, and they tried to push their way in to the house "to see a hydro bill". She immediately threatened to call the police and they left.