admiral44/MM...there was a thread on 03.13.2006 started by Carlotta..."Help with RENFE web site"...which should help. I think someone simply put an 8 digit number in the NIF field and solved the problem!!

...for what it is worth, if you are travelling through Madrid Airport you can both book and obtain tickets at the RENFE kiosk at Terminal 1....best to check the closing time for the kiosk...i got there with about 5mins to spare earlier this year.I don't remember for sure but i think it closes at 5 or 6 pm(???)