We were warned this may happen when we cancelled Comcast TV and Phone so I wrote a letter specifically identifying that we had returned the equipement, and cancelled the service (By phone since local Customer Service Office said they were not allowed to cancel TV service contracts). I gave them the number on the receipts for the return of the equipment, etc. I had the letter Notarized at the bank and sent it to Comcast Hdq's in Philadelphia. I included the dates the equipment was returned and service cancelled. Also included return recieipt required. looks like it worked since I have not been billed for the equipment of service since the dates I provided. As an aside, we went to Direct TV and it is terrific.