I've never understood the purpose of registering appliances, so I've never bothered doing it. The guarantee - one year or two, or sometimes (in the case of a Samsung washing machine, for instance) the guarantee is 5 years. All you need to do is retain proof of purchase to make a claim under the guarantee. I have done this on more than one occasion and I have never, ever been asked if my appliance has been registered. It is, as wildswan said, simply a device to get all your details onto their mailing database and flood your inbox/doormat with offers and newsletters for evermore.
I am procrastinating and need to stop!
