There is less detailed guidance under UK GAAP.
Where vouchers are issued revenue should be reported
at the consideration received or receivable less the fair
value of the awards, having regard to the proportion of
the vouchers expected to be redeemed, only where the
fair value is significant in the context of the transaction.
Free vouchers distributed independently of a sales
transaction do not give rise to a liability, unless
products would be sold at a loss, resulting in an onerous
contract.