Real Decreto 933/2021 is a Spanish regulation that requires accommodation providers, including vacation rental hosts, to register guests and bookings with the authorities. Its goal is to improve public security and help prevent criminal activity in the holiday rental sector. As a host with properties in Spain, you need to understand your obligations and how Holidu's online check-in feature helps you meet them.

What is Real Decreto 933/2021?

Real Decreto 933/2021 sets out the rules for collecting and reporting information about guests, properties, and bookings in Spain. Hosts and intermediary platforms such as Holidu must share this data with the Spanish Ministry of the Interior. The law took effect on January 2, 2023, and its transition period ended on October 1, 2024. Since then, incomplete or late reporting can lead to fines:

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

How does this affect hosts on Holidu?

If your property is located in Spain, you must report guest and booking details within 24 hours after each check-in. This applies to all properties in Spain, regardless of where the host lives or what nationality they hold.

You are responsible for making sure the reported information is complete and accurate, even when Holidu sends it on your behalf.

What information must you report?

The required data falls into four groups:

• Host details
• Property details
• Guest information for everyone in the booking
• Booking and transaction details

Holidu automatically collects the booking and transaction data. You need to make sure the following guest information is collected:

• Full name
• Date of birth
• Residential address
• Contact details (phone number or email address)
• ID type and number (for adult guests)
• Support number for guests with a Spanish ID (NIF or NIE)
• Relationship to any minors travelling with them, where applicable

Guests provide this information through the online check-in form, which Holidu emails to them. You can also find it in the booking details.

Where do you report this data?

Data must be reported to SES Hospedajes, the platform run by the Spanish Ministry of the Interior. If your property is in Catalonia, continue reporting to the Mossos d'Esquadra. If it is in the Basque Country, report to the Ertzaintza.

How Holidu helps you comply

Holidu acts as an intermediary platform. It securely stores the data needed for properties in Spain and reports it automatically. Here is how the process works:

• Booking data is sent to SES Hospedajes within 24 hours after a booking becomes non-refundable.
• If a non-refundable booking is later cancelled, Holidu updates SES Hospedajes to withdraw the reported booking.
• When online check-in is active, guest details are sent automatically to the relevant authority by 11:00 PM on the check-in day.

Even with this automation, it is your responsibility to confirm that every mandatory guest detail is on file. If anything is missing, collect it from your guests at check-in.

How to submit guest data through Holidu's online check-in

Follow these steps to set up automatic reporting:

1. Register on the SES Hospedajes platform through the official Ministry of the Interior portal linked below.
2. Select "Hospedajes y alquiler de vehículos" and find the "Access to the register of HOSPEDAJES establishments and entities" section.
3. During registration, select "Send communications via webservice."
4. In your Holidu account, activate the Guest Online Check-in feature and choose your authority: SES Hospedajes, Mossos d'Esquadra, or Ertzaintza.
5. Enter your login details for SES Hospedajes or the regional authority you selected.

Once setup is complete, Holidu sends guest details automatically. Double-check that you selected the correct authority, entered the right credentials, and ticked "Send communications via webservice" on SES Hospedajes. Incomplete data can result in fines, so review guest details regularly.

For a full walkthrough of the feature, see our Guest Online Check-in FAQs.

Useful official links

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

Frequently asked questions

When did Real Decreto 933/2021 come into force?

The decree took effect on January 2, 2023, with a transition period that ended on October 1, 2024. Non-compliance can now result in fines.

Does this apply if I am not a Spanish resident?

Yes. The rules apply to every property located in Spain, regardless of where the host lives or their nationality.

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

Yes. You must make sure all mandatory guest details are collected and accurate. If something is missing, collect it from the guest at check-in.

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

There is no separate report. You can check your confirmed and non-refundable bookings in your Holidu account. Cancelled bookings are withdrawn from SES Hospedajes automatically.

What happens if a non-refundable booking is cancelled?

Holidu updates SES Hospedajes to cancel or withdraw the previously reported booking.

Where do I report guest data?

Report to SES Hospedajes. In Catalonia, report to the Mossos d'Esquadra. In the Basque Country, report to the Ertzaintza.

What is the deadline for sending guest details?

Guest details must be reported within 24 hours after check-in. When online check-in is active on Holidu, guest details are sent automatically by 11:00 PM on the check-in day.

Why is this reporting required?

The requirement helps authorities monitor accommodation use more effectively, which improves safety for residents and visitors.

I have activated online check-in. Am I all set?

Check that you selected the correct authority, entered valid credentials, and enabled "Send communications via webservice" on SES Hospedajes. Then confirm that guest details are complete for each booking.