There are 4 things you need to know before crossing the border into Spain:
1- Citizens of the European Union, Andorra, Iceland, Liechtenstein, Norway and Switzerland only need their identity document to enter Spain.
2- For countries exempt from Schengen entry visa requirements (see list), for stays not exceeding 90 days, a passport valid for more than three months after the end of the stay is required.
3- In accordance with the Convention implementing the Schengen Agreement, passengers travelling to or from another Schengen state do not need a new visa, as this is a domestic flight.
4- Nationals of other states require a visa to enter Spain, which can be requested from the Spanish consulate or embassy in the country concerned, for stays of up to 90 days.
ETIAS
ETIAS stands for European Travel Information and Authorization System. It is a completely electronic system that allows and keeps track of visitors from countries who do not need a visa to enter the Schengen Zone. In a way, it resembles the U.S. Electronic System for Travel Authorization (ESTA), which serves a similar purpose.
Also, there should be no confusion that there are countries in the EU that are not members of the Schengen Zone, which the ETIAS authorization doesn’t prevent you from entering.
These are the European countries that will require a valid ETIAS upon arrival at their borders:
Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden and Switzerland.
Fill out the form on the official ETIAS website: Click here
MORE INFORMATION
AUTHENTIK ADVICE: Make copies of your passport before leaving for your vacation. Keep a copy in a separate location from the original. That way, if your passport is lost or stolen, it will be much easier to get help.
IMPORTANT NOTE: These laws and regulations may change without notice. We strongly recommend contacting your Embassy or High Commission before planning your trip.
What Documents do I Need when Travelling with Children?
Minors, in addition to their identity document, must present parental authorisation to travel.
Divorced or separated parents who share custody of their children should carry copies of the legal custody documents.
Adults who are not the parents or guardians of a child with whom they are travelling must have a written consent letter from the parents or guardians authorizing them to take the child on a trip out of the country. The consent letter should include addresses and telephone numbers where the parents or guardian can be reached and confirm that the child has not been abducted and is not accompanying the adults in question against their will.