How to register minors in SES Hospedajes: the age-14 rule, the data RD 933/2021 requires —including the Annex I kinship field—, who signs for the child, and why a missing kinship value gets the report rejected.
The age-14 rule
The question comes up constantly: "do I have to register the children?" Yes — every minor must be registered. What changes with age is not whether they are registered, but how. Royal Decree 933/2021 draws a line at 14 years old.
Children under 14 are not required to have an identity document or to sign: the law does not oblige a child that age to hold a DNI, so the system accepts the minor with no document number and no support number. From 14 onwards, however, the minor is treated like an adult for document purposes: you must provide their identity document (and, for the DNI, the support number).
What you DO have to report for an under-14
Not carrying a document does not put the child outside the register. For a minor under 14 you must report their basic identity data, plus one field that applies only to minors:
- ✓Full name.
- ✓Date of birth.
- ✓Nationality.
- ✓The kinship relationship with the responsible adult they travel with.
The kinship field: mandatory and a cause of rejection
Kinship is the most-forgotten field and the one that causes the most rejections with minors. RD 933/2021 includes it in its Annex I and makes it mandatory whenever there are minors among the travellers: it states the child’s relationship to the responsible adult (son/daughter, grandchild, niece/nephew, ward, and so on).
It is not a decorative field: the system rejects a minor’s communication if the kinship value is missing. So in any stay with children, make sure you collect and report that relationship. It is the difference between an accepted submission and a batch that bounces over the easiest guest to overlook.
Who signs for the minor
The signature that confirms the data is accurate comes from the responsible adult, not the child. A child under 14 does not sign the report: no document and no signature are requested from them. The adult they travel with signs for the stay and assumes the declared kinship relationship.
For under-14s, residence data is usually taken from the responsible adult too, because the rule does not require a child that age to provide their own address. In practice, the minor "hangs" from the adult for the signature and the address, and provides on their own only their name, date of birth, nationality and kinship.
Ages 14 to 17: like an adult for the document
The 14-to-17 bracket is often misread. Although still a minor, for document purposes they behave like an adult: you must provide their document type and number and — if it is a Spanish DNI or NIE — the card’s support number.
In other words, the document-and-signature exemption is only for under-14s. A 15- or 16-year-old with a DNI must be reported with their document like any other traveller. Confusing "minor" with "under 14" is a common source of incomplete reports.
How BookCheckin handles it
During online check-in, BookCheckin applies these age rules automatically. It does not ask an under-14 for a document or signature, but it does collect their name, date of birth, nationality and the kinship with the responsible adult, so the report does not bounce over that field. From 14 onwards, it requests the document as it would for an adult.
The responsible adult signs once for the stay, and the platform takes from them the data the minor does not provide (such as residence). That way reports for families with children are filed complete on the first try, without the classic missing-kinship error. You can start with a single property, no minimums.
Related resources
- SES Hospedajes guide— What it is, who must comply and what data the traveller report requires
- Traveller report template— The mandatory fields for each traveller, minors included
- SES Hospedajes registration step by step— How to register and file your first report