Offices for applying for tax rebates for non-EU residents on their purchases in Spain.
Officce for stamped bills
All foreigners or Spanish citizens not residing in Spain or in a European Union country who are travelling to a third country are entitled to a Value Added Tax (VAT) refund on their purchases in Spain. To get the refund they must have their "Tax Free" cheques stamped at Customs. This can be done in the airport, in the arrivals area.