Getting old

We bought a new satnav as the old ones have finally given up the ghost. They tell me I have to register the machine via the interweb so I get up the page and start to complete the details, name, address, post code, email, phone number, place of purchase, price and the serial number. The serial number? Well I found it but to actually read it, well that's not easy. I entered the number as I saw it - no its wrong. Changed the letters to capitals - no still wrong. Change the B to an 8 - still wrong. Then a brainwave. I took a photo of the bottom of the satnav and enlarged it. And the problem became clear, it is a U, not a V. So its sorted, until they start to ask more questions, five more pages of information. They now own my whole life story. Hope it does them some good.