Could you tell me which is the passport number of a Spanish passport ?
Is it the number which says "passport number", or the other one ?
Never seen a Spanish passport, but assume like UK it conforms to EU requirements, so where it says insert passport number you insert the passport number, not the computer style script at the bottom ofthe page I assume you are referring to.
When you get the opportunity, have a look at a Spanish passport. In the same position as the passport number on a British passport there is a number which I usually treat as the passport number being asked for.
Elsewhere on the same page (not among the computer script) is a quite different number which is labelled "passport number".
I would genuinely like to know which is the correct number to provide to an airline as the passport number.