Real Decreto 933/2021 is a Spanish regulation that requires accommodation hosts and intermediary platforms to collect and report guest, property, and booking information to the authorities. Its goal is to improve security and help prevent criminal activity in the holiday rental and car rental sectors. This guide explains what the decree means for you as a host on Holidu, what you need to do to comply, and how the Holidu online check-in feature helps you submit guest data.

What is Real Decreto 933/2021?

Real Decreto 933/2021 requires hosts and platforms to register detailed information about every guest staying at a property in Spain. The data is reported to the Spanish Ministry of the Interior through the SES Hospedajes platform. In Catalonia and the Basque Country, reporting continues to go to the regional police forces, Mossos d'Esquadra and Ertzaintza.

The decree applies to all properties located in Spain, regardless of the host's nationality or place of residence.

How does this affect hosts?

If you list a property in Spain on Holidu, you are responsible for making sure guest information is collected and reported. In practice, this means:

• Reporting guest and booking details within 24 hours of each check-in.
• Collecting the mandatory information for every guest in the booking, including minors.
• Checking that the information is complete and accurate before it is submitted.
• Collecting any missing details directly from guests at check-in.

Information that must be reported includes:

• Host details and property details
• Full names of all guests
• Date of birth
• Residence address
• Contact details (phone or email)
• ID type and number for adult guests
• The "Soporte" ID number for guests with a Spanish ID (NIF or NIE)
• Relationship to any minors travelling with them, where applicable
• Booking and transaction details

Holidu automatically collects the transaction data. Guests provide their personal details through an online check-in form that Holidu sends by email and that is also accessible in the booking details.

Penalties for non-compliance

Since the transition period ended on October 1, 2024, incomplete information (serious infraction) or late reporting (minor infraction) may lead to fines, depending on severity:

• Minor: €100 to €600
• Serious: €601 to €30,000
• Very serious: €30,001 to €200,000

How Holidu helps you comply

As an intermediary platform, Holidu securely stores the property, guest, and booking data needed for reporting. Once your account is set up, Holidu transmits the data to the authorities automatically. Reports are sent within 24 hours after a booking becomes non-refundable, and guest details are sent by 11:00 PM on the day of check-in.

If a non-refundable booking is later cancelled, Holidu updates SES Hospedajes to withdraw the previously reported booking information.

Automation does not remove your responsibility. You should still check that every guest's details are complete.

How to submit guest data through Holidu: step-by-step

Follow these steps to set up the online check-in feature for reporting:

1. Register on the SES Hospedajes platform through the official Ministry of the Interior portal at https://sede.mir.gob.es/opencms/export/sites/default/es/procedimientos-y-servicios/hospedajes-y-alquiler-de-vehiculos/.
2. Select "Hospedajes y alquiler de vehículos" and open the "Access to the register of HOSPEDAJES establishments and entities" section.
3. During registration, select "Send communications via webservice." This option is required so that Holidu can send data to the authorities on your behalf.
4. In your Holidu account, activate the Guest Online Check-in feature and choose the relevant authority: SES Hospedajes, Mossos d'Esquadra, or Ertzaintza.
5. Enter your login details for SES Hospedajes or the applicable regional authority.

Once these steps are complete, Holidu sends guest details automatically. For full setup instructions and answers to common questions about the feature, see the Guest Check-in FAQs.

Useful official resources

• Official BOE publication of Real Decreto 933/2021
• Official BOE publication BOE-A-2015-3442, Article 39

Frequently asked questions

When did Real Decreto 933/2021 come into force?

The decree came into force on January 2, 2023, with a transition period that ended on October 1, 2024. Since then, incomplete or late reporting may result in fines.

Does this apply if I am not a Spanish resident?

Yes. The regulation applies to all properties located in Spain, whatever the host's residence or nationality.

Where do I report guest data?

Data must be reported to the SES Hospedajes platform. If your property is in Catalonia, reporting goes to Mossos d'Esquadra. If it is in the Basque Country, reporting goes to Ertzaintza.

Do I need to check guest details if Holidu reports them?

Yes. You are responsible for making sure all mandatory details are complete and accurate. If anything is missing, collect it from the guest at check-in.

What should I do if a booking is cancelled?

Holidu updates SES Hospedajes to cancel or withdraw the booking information it previously reported. You do not need to take any action yourself.

Can I see a list of the bookings Holidu has reported?

There is no direct list of reported bookings. You can check which bookings are confirmed and non-refundable in your Holidu account. Cancelled bookings have their data withdrawn from SES Hospedajes.

I have activated Online Check-in. Am I all set?

Check that you selected SES Hospedajes (or the relevant regional authority), entered the correct credentials, and ticked "Send communications via webservice" on the SES Hospedajes platform.

Why is this reporting required?

Reporting helps the authorities monitor accommodation use, which supports safety for residents and visitors.