I switched to another company on Jan 9th, 2012 and when I called ADT to cancel, I was told there is a 30 day notice required (there is nothing in any of the paperwork I have that says a 30 day notice is required). I got a letter dated Jan 18th that said I would get a final bill. The bill came on Feb 24th and was for $77 for service up to Mar 14. I called and complained about this and they cut it back to $44.82. Watch this company if you have service with them and if you don't please stay away from them. No one should have to pay $44 just to stop service on anything.