At this point it might help everybody if I attach a file from the Trussell Trust. They administer the Food Bank that I donate to :::
http://www.trusselltrust.org/resources/documents/Press/General_Foodbank_Appeal2012_NORDO.pdf
When I have been there on a Thursday with my carrier bag of tins and packets, I have noticed that the Vouchers that people bring are a dark red colour. This is to prevent them being photocopied. Only three Vouchers can be present each year by anybody. The chap who I have got to know has told me that they have to turn people away each week, because they have already seen them before.
This chap is from a local Baptist church, who are running the show. So it would seem to me that precautions are being taken to ensure that little fraud is happening.
Its sad that this post has degenerated into such a slanging match. Perhaps if more people were to visit their local Trussell Trust Food Bank, they could see for themselves how hard the people work to give their fellow citizens a helping hand.
Take a few tins with you when you visit...your efforts will be much appreciated.