You can also check wins on teletext, but if I were you, I would simply write to National Savings, quoting your holders number. Ask for a list of recent wins. They will reply saying they can only go back 18 months, but this is just to put you off. In fact if you insist, they can go right back through your purchase history. I do this regularly because I recently had some mail go 'astray'. This is a polite way of saying it was stolen by thieves within the post office. When I asked for a list of recent wins, I found that I had 3 wins-2 of �50 and 1 of �500 which I had never received. I contacted National Savings BBC TVs Watchdog, BBC Radio 4s Money Box, and local radio, but couldnt find any interest. Nat Savings simply replaced the bonds, but my faith in the system is well and truly shaken. If the wins had been bigger, the postal thieves would no doubt have stolen more of my mail to assume my identity, and then opened up an account in my name. Bond win envelopes are readily recognisable. The cheques would then have been paid in and withdrawn, without me knowing a thing about it. As it was, I dont receive cheques, Ive elected to have more bonds in lieu, which are useless to thieves so the opened envelopes would simply have been discarded. Royal Mail spend millions on security every year, and many hundreds of workers are sacked or prosecuted for fraud. Only today there is a case on the news involving a gang of African asylum seekers who stole cheques in the London area, netting millions of pounds. The �500 win was the biggest Ive had and the fun of finding a cheque from out of the blue was totally lost. Premium bond can be a good investment, but National Savings are the sloppiest organisation there is. They may as well print 'YOU HAVE A WIN' on the outside of their envelopes!!! Dont let them away with a thing. Keep writing until you get satisfaction. And you DONT need to put a stamp on your envelopes as National Savings are UK treasury backed.