When an individual inherits assets located in Spain they are required to pay inheritance tax on the amount they have inherited. Up until very recently non-residents of Spain often found themselves paying more in Spanish inheritance tax than those who were resident in the country – even if the amount they were inheriting was the same.
The good news is that due to recent changes to Spanish inheritance tax law, if you have paid Spanish inheritance tax in the past four years and either you, or the person from whom you inherited, were non-residents of Spain at the time you inherited, then you could be eligible for a full or partial refund from the Spanish tax authorities.