|Subject: Re: The Truth About an International Driver's License|
I'm fairly certain it is not necessary although I have no Spain experience. I've rented cars in France, England, The Netherlands, Belgium, Italy, Germany, etc. and never used one. I would think that if it was legally required the rental companies would require it which in my experience they don't. (They do require a State license though!!! I made the mistake of leaving mine home once.) The only advantage the license gives you is that it has your information in multiple languages and will be recognized by most police.