You can find this on the tv licence website. Straight from the horse's mouth:
You must let us know so that we can update our records to reflect your status. This will ensure that we do not continue to contact you unnecessarily.
We may need to confirm your situation by visiting your premises.
begin 666 white.gif K1TE&.#EA`@`"`( ``/___P```"'Y! ``````+ `````"``(```("A%$`.P`` ` end