The NIE (Número de Identificación de Extranjero) is the ID for foreigners in Spain and it is what you will need to open a bank account in Barcelona. The process for obtaining it is not very difficult, but it will take some paperwork and time. If you are a citizen of the EU, you will have to go to a different address then if you are from a different country.
It has been mentioned to some that you need a marriage certificate for the NIE, but it has not been asked of us. You do need a letter explaining how you will finance your stay here (students will have this letter from their application to IESE, but make sure your name is included in the letter as well). Students will also need to show a letter that they were accepted to IESE.
Address for EU citizens:
C/ Balmes 192 (10 minutes walk from Diagonal metro.) The office is open from 9am to 2pm but it is advised to go at an early time.
Address for Non-EU citizens with a student VISA (as well as spouses and children with this VISA):
1-3 (corner C/Bosch) Metro station: Diagonal. The office is open from 9am to 2pm but it’s advised to go at an early time. Guadalajara
For a detailed list of Spanish consulates around the world, see www.embassiesabroad.com.