I am part of a community group, that wants to hold a raffle at an event at Christmas. We want the prize to be a £100 voucher, that must be spent in one or more of the local shops (we're encouraging local trade).
Can anyone think of a good, fraud free, way of giving a voucher that can be exchanged in several shops? I'm thinking that they might want to spend £50 in the butchers, £30 in the greengrocers, etc.