I want to book train tickets on the Renfe website for my trip to Spain in September, but when I go to buy them it wants a "Foreigner ID Number." I read this should be your passport number, but I am in the process of changing my name and getting a passport, so I don't have a number yet and won't for a while.
Is there any way I can still book online without it? Can I use my drivers license number?
Thanks!