The new rules mean that holidaymakers arriving in Spain will have to provide a significant amount of personal data to their hotel - in total, hotels will need to collect 42 pieces of personal data from tourists.
On December 2, 2024, the Spanish Government also implemented new regulations, mandating that hotels must gather extensive personal information from tourists.
Regarding having funds for their stay, the Spanish Ministry of Foreign Affairs website states that holidaymakers are required to have a minimum of €114 (around £95) per person per day.
In addition to a valid passport, the Foreign Office warns that visitors could be asked to provide a return or onward ticket, proof of travel insurance, confirmation of a hotel booking or an invitation - if staying with family or friends, and proof of sufficient funds for their stay.
As Spain, Greece and Portugal are all members of Schengen Zone, they will all fall under the EU's new Entry/Exit System (EES), which is due to be implemented this year.