Real Decreto 933/2021 is a Spanish regulation that requires accommodation hosts and booking platforms to report guest and booking information to the authorities. This guide explains what the law means for you as a host on Holidu, what you need to do, and how Holidu's online check-in feature helps you comply.

What is Real Decreto 933/2021?

Real Decreto 933/2021 is a Spanish Royal Decree that aims to improve security and prevent criminal activity in the holiday rental and car rental sectors. It requires hosts and intermediary platforms such as Holidu to collect and report details about guests, properties, and bookings to the Spanish Ministry of the Interior.

The law came into force on January 2, 2023, with a transition period that ended on October 1, 2024. Since then, incomplete or late reporting can lead to fines.

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

How does this law affect hosts?

If your property is located in Spain and listed on Holidu, you must report guest and booking details for every stay. The deadline is 24 hours after each guest checks in. This applies to all properties in Spain, regardless of where you live or your nationality.

You are responsible for making sure all mandatory guest information is complete and accurate. Holidu can send the booking data for you, but you still need to collect the guest details that only you or your guests can provide.

Information you need to report

The required information falls into four groups:

• Host details
• Property details
• Booking and transaction details (Holidu collects these automatically)
• Guest information for every person in the booking, including:
  • Full name
  • Date of birth
  • Residential address
  • Contact details (phone number or email)
  • ID type and number for adults
  • "Soporte" ID number for guests with a Spanish ID (NIF or NIE)
  • Relationship to any minors travelling with them

Where do you report?

Most properties report to the SES Hospedajes platform run by the Spanish Ministry of the Interior. If your property is in Catalonia, you also report to the Mossos d'Esquadra. If it is in the Basque Country, you report to the Ertzaintza.

How does Holidu help you comply?

Holidu collects and securely stores the booking data for your Spanish properties. Through the Online Check-in feature, guests receive an email from Holidu with a form to complete their personal details. Once they submit it, Holidu sends the information to the relevant authority automatically, so you do not have to enter it manually.

Holidu also updates SES Hospedajes if a reported booking is cancelled, so the records stay accurate.

How do I submit guest data through Holidu?

Follow these steps to set up automatic reporting:

1. Register on the SES Hospedajes platform. Select "Hospedajes y alquiler de vehículos" and find the "Access to the register of HOSPEDAJES establishments and entities."
2. During registration, select "Send communications via webservice."
3. In your Holidu account, turn on the Guest Online Check-in feature.
4. Choose the correct authority: SES Hospedajes, Mossos d'Esquadra, or Ertzaintza.
5. Enter your login details for that authority.

After setup, Holidu sends guest details to the authority automatically by 11:00 PM on the check-in day. Check that each booking has complete guest information, and collect any missing details from guests at check-in to avoid fines.

For more detail, see our guide to the Guest Check-in feature.

Quick checklist

• Your SES Hospedajes account is registered and set to receive communications via webservice.
• The Online Check-in feature is active in your Holidu account.
• The correct authority is selected, with valid login details.
• Guest details are complete before each check-in.

Useful official links

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

Frequently Asked Questions

When does the law apply to me?

The law applies to every property in Spain that you list on Holidu. It came into force on January 2, 2023, and the transition period ended on October 1, 2024.

Do I need to report guests if I do not live in Spain?

Yes. The requirement applies to all properties located in Spain, regardless of where the host lives or what nationality they have.

Does Holidu report the data for me?

Yes, once you activate the Online Check-in feature and connect your authority credentials, Holidu sends the booking data automatically. You are still responsible for making sure the guest details are complete and accurate.

What if a reported booking is cancelled?

Holidu updates SES Hospedajes to cancel or withdraw the booking information.

Can I see a list of bookings Holidu has reported?

There is no separate list of reported bookings. You can check your confirmed bookings in your Holidu account. Cancelled bookings have their data withdrawn from SES Hospedajes.

What happens if I do not report on time or report incomplete data?

Late or incomplete reporting can be treated as an infraction. Fines range from €100 to €200,000, depending on how serious the infraction is.

Where do I report if my property is in Catalonia or the Basque Country?

Properties in Catalonia report to the Mossos d'Esquadra. Properties in the Basque Country report to the Ertzaintza. Select the correct authority in your Holidu account.

Why is this reporting required?

The requirement helps the authorities monitor accommodation use more effectively, which supports the safety of residents and visitors.