Guests under 18: what data to collect, minors travelling without parents, cots and extra beds. Spain, Portugal, Italy and Greece (2026)

Updated: 9 November 2026

A family arrives with a baby and a 15-year-old. What details do you take for each? And what if a 17-year-old calls to book alone? This is what we checked in official gazettes and government websites (links at the end). This is not legal advice: where we could not confirm something we say so, and you should check with your adviser.

The essentials in one minute

Spain: every guest over 14 signs the registration form. The accompanying adult gives the details of children under 14.
Spain: if a minor is travelling, you must record the family relationship between the guests.
We found no Spanish or Andalusian rule that bans hosting unaccompanied minors. You set your own policy; in Andalusia, house rules must be displayed at the entrance (Act 13/2011, art. 36.2).
Booking.com and Airbnb require users or account holders to be 18.
Cots, extra beds and the age of a «child» are not set by the rules we read: you set them. Publish them with clear numbers.

Spain: what to record for a minor (Royal Decree 933/2021)

Royal Decree 933/2021 governs the guest register sent through SES.HOSPEDAJES:

Art. 4.2: every person over 14 signs the form. The details of children under 14 are given by the adult accompanying them.
Art. 5.1: the register includes, where relevant, the details of children under 14.
Annex I: each guest's data are name, surnames, sex, document number and type (DNI, passport, TIE), nationality, date of birth, usual residence, phone numbers, email and number of guests.
Annex I: «family relationship between the guests (if any of them is a minor)». It applies to professional and non-professional accommodation.
Art. 6.3: the report is immediate and within 24 hours at most.
ID document for under-14s? The decree sets no age. INCIBE (case published 8-7-2025) says that for under-14s name, surnames, date of birth, nationality and relationship are enough, without ID, and that 14-17-year-olds give the same data as adults. We could not confirm this in the SES.HOSPEDAJES help: the Interior Ministry website did not open.

Spain: can I host a minor travelling without parents?

We found no rule that bans it or sets a minimum age to stay:

The Andalusian Tourism Act 13/2011 does not mention minors or age.
Its art. 36.1 says accommodation is open to the public and access may not be restricted on discriminatory grounds (race, sex, religion, opinion...).
Its art. 36.2 allows access and stay to be subject to house rules displayed visibly at the entrances.
If you set a rule (for example, minors only with an adult or with signed permission), put it in those house rules and your booking terms, and apply it to everyone.
The Andalusian hotel decree (Decree-Law 13/2020) did not open for us, and we did not check other regions: not confirmed there. Ask your adviser whether your rule is valid.

Portugal: minors on the accommodation form (SIBA)

Foreign guests must be reported, including citizens of other EU countries (Law 23/2007, arts. 15 and 16, according to SIBA's data protection notice).
The data go to the UCFE and are kept for one year.
The SIBA manual (v1.5) says all fields are mandatory except place of residence and place of birth. Date of birth is included.
Neither the manual nor the data protection notice mentions minors. In this review we did not read who may sign for minor children: check the text of Law 23/2007.

Italy: families and groups in Alloggiati Web

The official Alloggiati Web guide classifies each guest:

Single guest, head of family or group leader: with ID document details (type, number and place of issue).
Family member or group member: no document details; entered right after their head of family or group leader.
For everyone: name, date and place of birth, sex, citizenship and length of stay.
The guide does not mention minors or any age. We could not read art. 109 of the TULPS (the police website blocked us): not confirmed.

Greece: what we know and what we don't

AADE's Digital Customer Register (Ψηφιακό Πελατολόγιο) has been mandatory since 1-7-2025 for the businesses in decision Α.1057/2025. According to AADE's FAQ (January 2026), these are vehicle-related sectors, not accommodation.
Hotel guest registration with the police and rules on minors: not confirmed. Ask your accountant or hotel association.

Booking.com and Airbnb: minimum age

Booking.com customer terms (A4.6): you must be at least 18 to use the platform, unless otherwise indicated.
Airbnb terms for European users: only people aged 18 or over may register (section 18). Anyone who books for or brings a minor must be legally authorised to act for them and is solely responsible for supervising them (section 3).
Your own policy may ask for more (for example, that the person who books stays). Write it the same way on every channel.

Cots, extra beds and the age of a «child»: write your policy

None of the rules we read sets these numbers. Decide and publish:

Are children allowed? From what age?
Up to what age is a guest a «child» and up to what age an «infant» (for example 0-2 and 3-11: an example, not a rule).
Price per age band: free, per night or per stay.
How many cots and extra beds fit in each room, the price and whether they must be requested in advance.
Maximum occupancy per room, counting infants.
What you ask for if the minor travels without parents (permission, an adult contact).

How to publish it for Google and AI

AI assistants read text and structured data. Use the same numbers on your website, Google and the platforms:

On your website, a «Children and extra beds» section in plain text, not an image.
Google's vacation rental structured data: amenityFeature «childFriendly» and «crib», and occupancy for the maximum number of guests.
schema.org LodgingBusiness has no property for a children policy or minimum age: write it as text and use amenityFeature, checkinTime and checkoutTime.
In your Google profile, family attributes (for example kids friendly, kids club, babysitting) exist in Google's lodging API: fill them in if they apply.
Booking.com lets you set whether children are allowed, the minimum age, cots, extra beds and prices per age band: make them match your website.

How iQuota helps

iQuota does not give legal advice or file your guest reports. We publish your property in AI assistants with direct booking and payment at the property, and help you keep your children, cot and extra bed policy identical everywhere. We do not promise that an AI will recommend you.

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Frequently asked questions

From what age does a minor sign the guest form in Spain?

From 14 (art. 4.2 of Royal Decree 933/2021). The accompanying adult gives the details of children under 14.

Do I have to record the family relationship?

Yes, if any guest is a minor (Annex I of Royal Decree 933/2021).

Can someone under 18 book on Booking.com or Airbnb?

No: both platforms require users or account holders to be 18.

Sources

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