Hi there, I've worked as an Admin staff at my super-duper-big-and-shiny comet since december, and I can tell you that no, there is no way and Comet shop will accept Kingfisher vouchers. I don't know all the ins and outs of it, but basically, there's no way we can guarentee we get the money from them, as something other is going wrong at Kingfisher. There is no physical way via the tills we can even process them. But you are entitled to a full refund via the address on the back.