Yes, that's quite correct. The Lotteries and Gaming Act (or such like) states that it must be free to enter. We do abide by these rules, hence the 'send your name and address on a postcard' line. We do get a few entries each month, which are duly entered - and i think we've had one winner from these.
To eradicate any 'did you get my postal entry or not' issues and any ensuing 'you didn't enter me' questions, we ask for the entry to be sent by Recorded or Special Delivery (ie Signed For) to make absolutely sure the entry has been received. This makes it 100% above board that we have received and signed for any postal entries - and they are guaranteed to be in that months draw.
That said, it actually works out cheaper to be a Gold Member (and a lot less effort)...
Lee
BeoWorld - Everything Bang & Olufsen