“It also looks like they have revoked any previously issued coupons (none of mine are working). No word on whether they will be cancelling preorders or not, let me know what happens to any of yours.”

Please first note that although this may look like legal advice if you squint it isn’t.

I am fascinated by this – are there more T&Cs with the voucher? I have read over the existing T&Cs, and there does not appear to be any justification for the withdrawal of existing issued vouchers. Note that this is supported by the fact that Sky *do* list circumstances where the prize may be withdrawn.

Zavvi’s T&C’s on the Britvic site are as follows:

“15% off Vouchers may be won or can be earned through collecting points and redeeming on http://www.rewardyourthirst.com.
* Voucher is a single use voucher and can not to be used in conjunction with any other voucher offer.
* Voucher is valid from 00:00:00 01/11/2010 to 23:59:59 31/03/2011.
* Maximum Spend £100.
* There is no cash alternative and the voucher is non-transferable.
* Employees of The Hut Group, their families and agencies, and anyone directly connected with the promotion are not eligible to use voucher.
* Promoter’s address is The Hut Group, Meridian House, Gadbrook Park, Northwich, CW9 7RA. In the event of unforeseen circumstances, the promoter retains the right to offer an alternative of equal value.
* Our standard Privacy Policy and Terms & Conditions apply. See website for details”

The Zavvi site T&Cs (http://www.zavvi.com/terms-and-conditions.info) do not appear to allow for the withdrawal of vouchers, and the standard claimed ability to change the T&Cs at will

a) does not affect the transaction that granted the voucher (and it was a transaction, as it one involving monetary consideration – see Carbolic Smoke Ball), and ;
b) the T&Cs are explicit (as they must be) that “If there is any inconsistency between the terms and conditions upon which the discount codes were issued and these terms and conditions, the discount code terms and conditions prevail”, so the T&Cs at the time of sale overrule any later changes. The discount codes were granted in an explicit contract, and the T&Cs on both sites have no justification for invalidating the granted voucher code prizes after they are granted.

People with invalidated codes that you haven’t used:

You almost certainly have a cause of legal action or Trading Standards complaint. This isn’t a technical violation – if I promise you a prize in return for the purchase of item a, you purchase item a and then I agree to give you the prize (or my agent gives it to you, as in this case), destroying it later it utterly unacceptable. It isn’t Zavvi’s property to destroy any more, it’s a symbol of a contractual obligation on Zavvi’s part. I am actually a little shocked on reading both T&C documents that this has been done without any clause relating to voucher invalidation.