Registering children in vacation rental: what data you need and what the law says

Yes, minors get registered too. Royal Decree 933/2021 makes no exceptions by age — every traveler staying at a tourist property must be reported to the authorities. But the data you need for a minor is different: they don't have their own national ID until age 14, they don't sign, and their data is linked to the responsible adult. Here's exactly what to ask and how to submit it without SES Hospedajes rejecting your report.

It's one of the most common questions from owners: "Do I have to register the 6-month-old baby?" The short answer is yes. The longer answer is that the process is simpler than it seems, but there are nuances worth knowing.

What does the law say?

Royal Decree 933/2021 establishes the obligation to communicate data for all travelers staying, regardless of age. This includes:

• Babies
• Children
• Teenagers
• Anyone who sleeps at the property

There's no minimum age for registration. If they sleep there, they get registered.

What data you need by age

Under 14 (no national ID of their own)

Children under 14 in Spain aren't required to have a national ID (DNI). That complicates things slightly, but doesn't make them impossible.

Data	Required	Notes
Full name	Yes	Complete
Date of birth	Yes	To verify they're a minor
Nationality	Yes
Identity document	Depends	See below
Relationship to responsible adult	Yes	Father, mother, guardian, etc.
Responsible adult's data	Yes	The adult must also be registered

About identity documents:

• Spanish minors without DNI: you can use the Family Book or the parent's DNI/passport as reference. In practice, many owners register the minor linked to the adult's document.
• Spanish minors with DNI (from 14, or if they have one earlier): use their own DNI.
• Foreign minors: passport. Foreign minors usually have their own passport, even babies.

Ages 14 to 17

From age 14, Spanish citizens are required to have a DNI. Registration is practically the same as for an adult:

Data	Required
Full name	Yes
Date of birth	Yes
Nationality	Yes
Document type and number (DNI/passport)	Yes
Relationship to responsible adult	Recommended

The main difference: they're still minors, so it's good practice to record the relationship with the accompanying adult.

How to submit to SES Hospedajes

In the traveler report you submit to SES Hospedajes, minors are included as additional travelers linked to the responsible adult. The system allows:

1. Register the adult with all their complete data
2. Add minors linked to that adult, indicating relationship
3. Reduced data for minors without their own document (name, surnames, date of birth, nationality)

If the minor has their own document (passport or DNI), they're registered with complete data like any other traveler.

Practical tip: always ask for the passport or DNI of minors who have one. It's easier to register them with their own document than without. Foreign minors almost always have a passport — ask for it.

Common situations

Family with 2 adults and 2 small children (no DNI)

• Register both adults with complete data
• Register both children linked to one of the adults (usually the one who made the booking)
• Children's data: name, surnames, date of birth, nationality, relationship

Group of friends with a 16-year-old

• Register all adults with complete data
• The 16-year-old is registered with their DNI (they already have one) linked to the responsible adult in the group
• If there's no direct family relationship, the adult who made the booking assumes responsibility

Baby of a few months

• Registered the same as any minor without DNI
• Name, surnames, date of birth, nationality
• Linked to father or mother

Foreign minor

• Minor's passport (almost all countries require it even for babies for international travel)
• Registered with complete data like any traveler
• Relationship with accompanying adult

Common mistakes

Mistake	Consequence	Solution
Not registering minors	Incomplete report, possible fine	Register everyone, no exceptions
Not asking for foreign minor's document	Can't complete registration	Always ask foreigners for passport
Registering minor without linking to adult	SES may reject the report	Always indicate relationship and responsible adult
Confusing "not required to have DNI" with "don't need to register"	Non-compliance	Minor without DNI is registered with reduced data

What if the guest refuses to provide children's data?

It happens rarely, but it happens. Some parents are reluctant to share minors' data for privacy reasons.

Your response: it's a legal obligation. It's not your whim or a property policy — it's the law. RD 933/2021 makes no exceptions. If they don't provide the data, technically you can't accommodate them (though in practice this is an extreme case).

A message like:

"By law, we're required to register all travelers staying, including minors. The data is sent directly to the authorities and we don't use it for anything else. It's a quick process — we just need name, date of birth, and passport number if they have one."

Direct, no drama, explaining the why.

How Autoregistro fits in

Autoregistro handles minor registration naturally within the group registration flow. When the guest fills out the pre-arrival form, they can add accompanying minors with the necessary data — automatically linked to the responsible adult. The system knows what data to ask based on age and document type, and sends the complete report to SES Hospedajes without you having to piece together the puzzle manually. One form, all travelers, zero hassle.

Frequently asked questions

Do I have to register a baby of a few months? Yes. The law establishes no minimum age. Every traveler who stays overnight is registered, regardless of age.

What document do I use for a Spanish minor without DNI? They're registered with reduced data (name, surnames, date of birth, nationality) linked to the responsible adult. You don't need a document from the minor if they don't have one.

Do foreign minors always have a passport? In the vast majority of cases, yes. Most countries require their own passport even for babies for international travel. Always ask for it.

Can I register all minors under the same adult? Yes. All minors in the group are linked to the responsible adult (usually the one who made the booking or the parent).

What happens if I don't register the minors? The traveler report will be incomplete. If there's an inspection or requirement, you may receive a fine for not having reported all guests.