Thanks for the post and welcome to the forum.
StuartRogerson is correct, once you complete your initial contract term then you will own the box. For your information I have found the section of the terms and conditions which covers this off, please see below,
I am having the same problem. Cancelled by contract a number of months after the 12 month contract expired and have since received a sms, email and yesterday a letter and plastic bag to return my equipment in. Any chance you could take a look or can I safely ignore them?
Isn't part of the reason for the return requests to comply with WEEE regulations that mean whoever makes electrical equipment has a responsibility for it's disposal? (http://en.wikipedia.org/wiki/Waste_Electrical_and_Electronic_Equipment_Directive)
I dare say they're also keen to get them back as re-conditioning an re-issuing a box is drastically less expensive than producing a new one.
I've changed products a few times with BT, ignored all the 'send the kit back' messages and never been charged so the messages are probably safe to ignore.
agree when i cancelled and moved to sky for tv, I got the emails and constant texting. Had to contact BT to get them to stop texting me regarding the return of the box.
Rather than BT waste time/money and annoying customers why don't they ask when the customer leaves if they wish to return the equipment or keep it.
if they decide to return then send out the bags and email/text confirmation otherwise don't bother
I would also advise customers to check the emails as BT wanted to charge me for cancelling TV even though I was not in contract
Also they cancel the service within 24 hours, not the 30 days after you have given notice to terminate and paid for.