I could give a few tips about what to know when dealing with banks in Spain :-
1. Never expect to achieve what you want in one visit.
2. No matter how prepared you think you are, and how many copies you may have brought with you of various documents, they will always think of something else you have to return with.
3. Expect the person helping you to be a chain smoker and get through at least a packet while talking to you.
4. If you think you have worked out what hours this bank opens, you'll be wrong. They'll change it the next day just to catch you out.
Anyone got any other ideas ?