if only i could be bothered to research this properly, i will post again if i do. i seem to remember from the days when i did my law degree that if 'things' are given to you by mistake you can keep them, but the (very old) law of restitution prevents you from keeping money that is given to you by mistake (its something to do with the concept that property passes between two people in title which can be done by mistake, whereas money technically all belongs to the crown so there is no passing of a title to a property). it sounds like the ombudsman may have some remedy to this and that would be a good avenue to try. (i'm now hoping theres a lawyer who works in this area reading this that can get my story straight for me) :-)