Guest registration is no longer a secondary admin task. It is now a core compliance workflow for any tourist accommodation operation, with direct impact on operations, guest experience, and sanction risk. If you manage holiday apartments or rentals, you need a robust flow to capture data, validate it, and prepare it for telematic filing.
This article summarizes key points from RD 933/2021, the distinction between professional and non-professional activity, and how to apply it operationally with BnCheck.
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Create free account1) What RD 933/2021 regulates in accommodation
Royal Decree 933/2021 establishes obligations for:
- Collecting traveler information.
- Communicating required data at regulated milestones.
- Maintaining documentary traceability depending on activity type.
In day-to-day operations, this requires robust forms, age-based rules, and pre-submission validation checks.
2) Professional vs non-professional activity: what actually changes
The regulation differentiates between:
- Professional activity: broader documentary scope and retention obligations.
- Non-professional activity: narrower scope, but still requires correct communication of mandatory data.
The operational consequence is clear: in both cases, data quality and frictionless telematic submission are critical.
3) Required data by age group
To reduce errors and rejection risk, your workflow should segment requirements by age:
A) Under 14 years old
- Basic identifying information.
- Date of birth.
- Nationality.
- Address, country, municipality, and zip code.
- Contact details.
- Relationship with responsible adult.
In this age group, document fields are not required at the same level as from age 14 onward.
B) Between 14 and 18 years old
- All general data listed above.
- Identity document: type and number.
- Support number (if applicable).
- Relationship data (because the guest is a minor).
C) Adults (18+)
- All general data.
- Identity document: type and number.
- Support number (if applicable).
- No minor-relationship requirement.
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View BnCheck4) Support number discrepancy: BOE vs. actual operations
In the legal regulations (BOE), there may be nuances regarding specific document fields based on the type of activity. However, in day-to-day operations, technical criteria must prioritize effective identity validation during the submission process.
SES.Hospedajes requires the "support number" (número de soporte) for identity document validation. This field is mandatory for electronic filing, regardless of the activity category.
Nevertheless, the platform provides a technical exception: for guests staying with a host who does not carry out the activity on a professional basis, it is possible to enter the value "NP" in the support number field.
Therefore, for operational and compliance purposes, this data should be treated as mandatory whenever it applies to the document type—using either the actual value or the "NP" code as appropriate—to minimize rejections and the need for re-processing.
5) Why automate guest registration with BnCheck?
With a digital flow in BnCheck, you can:
- Capture only the required fields for each check-in scenario.
- Enforce relationship data for minors and identity document data from age 14 onward.
- Validate support-document data when applicable.
- Prepare telematic filing with stronger consistency.
- Submit traveler reports in a faster workflow.
Official sources
Last reviewed: 30 July 2026.