Ultimate Beneficial Owner (UBO) in Spanish property transactions: what agents need to check

Q: What is a UBO and why do I need to identify one?

The ultimate beneficial owner (titular real) is the natural person who ultimately owns or controls a company, under article 4 Ley 10/2010. You need to identify them because, as a real estate agent, you are an obliged entity under the same law whenever a legal entity is involved in the transaction.

Short answer

If your buyer or seller is a company rather than a private individual, Spanish law (Ley 10/2010) requires you, as a real estate agent, to identify the ultimate beneficial owner (UBO) — known in Spain as the titular real — before you establish the business relationship or execute the transaction (art. 4 Ley 10/2010), meaning early in the process rather than at the end. The UBO is the natural person who ultimately owns or controls, directly or indirectly, more than 25% of the capital or voting rights of a company, or who otherwise controls its management (art. 4.2.b Ley 10/2010). This applies to you as an agent regardless of which languages you work in or where your clients come from — the obligation attaches to where the brokerage activity takes place, not to nationality.

Legal background

Article 4 of Ley 10/2010 requires every obliged entity (sujeto obligado) to identify the UBO and verify their identity before establishing a business relationship or carrying out the transaction. The law defines the UBO on two levels: (a) the natural person on whose behalf the relationship is established, and (b) the natural person who directly or indirectly holds more than 25% of the capital or voting rights, or who otherwise controls the company's management — for example through shareholder agreements, articles of association that decouple voting rights from shareholding, or the power to appoint the majority of the management body (art. 8 RD 304/2014).

When no individual can be identified above 25%. If, after reasonable measures, no natural person can be identified as holding more than 25% or otherwise controlling the company, article 8.b) RD 304/2014 provides a fallback rule: the company's director(s) are then treated as the UBO — the so-called titularidad real asimilada (deemed beneficial ownership). This is a legal deeming provision, not a shortcut around the check itself: you still need to be able to show why no individual could be identified above the threshold.

Since 2023, Spain also has the Central Register of Beneficial Ownership (Registro Central de Titularidades Reales, RCTR), created by Royal Decree 609/2023 of 11 July and managed by the Ministry of Justice. Obliged entities must consult it, but it does not replace your own due diligence: you may not rely solely on the register's data, except in the cases where simplified due diligence legally applies.

A point that matters specifically for international buyers on Mallorca: the obligation to declare beneficial ownership to the RCTR before acquiring property in Spain — set out for entities not managed from Spain or another EU state — applies to entities or structures without legal personality, such as trusts and comparable arrangements, not to ordinary foreign companies with their own legal personality. A UK Ltd. or a Dutch B.V., for instance, does not normally fall under this specific declaration duty, precisely because it has its own legal personality. What does happen often in practice: because it is neither a Spanish legal entity nor necessarily managed from Spain or the EU, that company may simply not appear in the RCTR at all — meaning you can't rely on a register search for this type of buyer and need to obtain the corporate documentation directly from the company and its home-country registry. It's trust structures — more common in Anglo-Saxon estate planning than in a direct corporate purchase — where the RCTR's pre-acquisition declaration duty clearly applies.

Failing to identify or report the UBO can constitute an infringement under the sanctions regime of Ley 10/2010: article 52.1.b) classifies a breach of the article 4 obligations as "serious" (grave), with the corresponding sanction set out in article 57. The law grades the sanction by the severity of the breach; there is currently no single figure that can be cited generally.

Looking ahead, article 3(3) of Regulation (EU) 2024/1624 (AMLR) keeps real estate agents as obliged entities from 10 July 2027 and explicitly strengthens beneficial-ownership transparency requirements at EU level. The technical detail depends on the Regulatory Technical Standards (RTS), which are expected by 2027.

Practical context

On Mallorca, international buyers — often Scandinavian, British or Dutch — frequently purchase through a company: a Spanish SL set up specifically for the deal, or an existing holding company from their home country. The usual reason is succession, estate or tax planning at home, not concealment. But from the agent's side, the corporate structure doesn't change the obligation: if there's a legal entity on the other side of the table, there's a UBO to identify. The statutory trigger is art. 4 Ley 10/2010: before establishing the business relationship or executing the transaction. The law names neither the reservation contract nor the arras (earnest money agreement) — settling it before those signatures is an internal process rule, not a statutory deadline. It remains sensible, because from that point a financial commitment is already in place and there is little room left to request further documentation. The duty comes from the law; the early timing comes from practice.

Step by step

Spot the legal entity. At first contact, clarify whether the buyer or seller is acting personally or through a company.
Request the corporate documentation. The deed of incorporation, plus a certificate or extract from the commercial registry confirming the declared beneficial ownership.
Check the RCTR. The register is mandatory to consult, but historical data is being loaded progressively, and if the counterparty is a foreign company with its own legal personality not managed from Spain or the EU, it may not appear in the register at all. Its absence — or incomplete data — does not exempt you from requesting the documentation directly from the client.
For foreign structures, request the full chain of control. Where there are intermediate companies, beneficial ownership can be indirect (combined holdings across several entities); the full chain needs to be documented, not just the first level.
Document and retain. UBO identification is part of the due diligence file and must be kept in line with the general document-retention period under Ley 10/2010. It belongs in the same file as the other due diligence measures, such as evidence of the source of funds.

Common mistakes

Confusing the director with the UBO. A company's director is not automatically the UBO — only if they also meet the ownership or control test under article 4.2.b.
Stopping at the first level. With intermediate companies, it isn't enough to identify who directly owns the buying entity — you need to trace the chain to the final individual.
Treating the RCTR as a substitute for your own due diligence. The register is a mandatory reference tool, not a shortcut that relieves the obliged entity from requesting and verifying documentation directly.
Requesting the documentation too late. What matters legally is the point before the business relationship is established or the transaction executed (art. 4 Ley 10/2010). Asking for beneficial ownership information after the reservation is signed additionally turns a due diligence step into a race against the transaction's timeline.
Assuming every foreign company appears in the RCTR or is subject to the same declaration duty. The specific declaration duty under RD 609/2023 is designed for structures without their own legal personality; a foreign company with its own legal personality can be entirely absent from the register.

How Doxario helps

Doxario is the KYC/AML compliance platform for real estate transactions in Spain, operated by Blue Pepper S.L. It structures UBO identification as part of the deal's digital file — document requests, KYB verification and audit trail — without replacing the agency's existing CRM or the agent's own final judgement.

Don't leave UBO identification until after the reservation is signed. Doxario structures the document request and KYB verification as part of the deal's digital file. See how Doxario works →

Frequently asked questions

What is a UBO and why do I need to identify one?

The ultimate beneficial owner (titular real) is the natural person who ultimately owns or controls a company, under article 4 Ley 10/2010. You need to identify them because, as a real estate agent, you are an obliged entity under the same law whenever a legal entity is involved in the transaction.

At what ownership percentage does someone count as a UBO?

Holding more than 25% isn't the only test: someone who otherwise exercises effective control over the company can also be a UBO, even without reaching that percentage (art. 4.2.b Ley 10/2010).

What happens if no one holds more than 25% or otherwise controls the company?

Article 8.b) RD 304/2014 provides a fallback rule: the company's director(s) are then treated as the UBO. This is known as deemed or assimilated beneficial ownership.

Is the director the same as the UBO?

Not as a general rule. A director is only treated as the UBO when, after reasonable measures, no individual can be identified holding more than 25% or otherwise exercising control (art. 8.b) RD 304/2014).

What if the buying company is foreign?

It depends on whether it has its own legal personality. The obligation to declare beneficial ownership to the RCTR before acquiring property in Spain, set out for entities not managed from Spain or the EU, is designed for structures without legal personality (trusts and similar arrangements). A foreign company with its own legal personality is not normally subject to that specific declaration duty and may be entirely absent from the register — in that case, you need to request the corporate documentation directly.

Does the RCTR replace requesting documentation from the client?

Not as a general rule. Checking the RCTR is part of UBO identification, but the obliged entity may not rely solely on the register's data, except in the cases where simplified due diligence legally applies.

What happens if I fail to identify the UBO correctly?

It can constitute a "serious" infringement under article 52.1.b) Ley 10/2010, sanctionable under article 57. The law grades the sanction by the severity of the breach; there is currently no single figure that can be cited generally.

Will this change under the EU's AMLR?

Yes. The AMLR (Regulation (EU) 2024/1624) keeps real estate agents as obliged entities from 10 July 2027 and strengthens beneficial-ownership transparency requirements at EU level, though the technical detail depends on Regulatory Technical Standards that are still pending.

About the author

Christopher Deppe is Managing Director of DC Finest Real Estate Mallorca and founder of Doxario, a KYC/AML compliance platform for real estate transactions in Spain. He has more than 15 years of experience in the luxury segment of southwest Mallorca. As the founder of Doxario, he has an economic interest in the solution described in this article.

This article is for general informational purposes and does not replace individual legal advice from a lawyer. AI-assisted tools were used in the preparation of this article; the content was subsequently reviewed and approved by the Doxario editorial team. An update is planned following publication of the final AMLR technical standards.

Legal basis and sources

Ley 10/2010, of 28 April, on the prevention of money laundering and terrorist financing (esp. Arts. 2.1.l, 4, 52.1.b, 57)
Real Decreto 304/2014
Real Decreto 609/2023 (Registro Central de Titularidades Reales)
Regulation (EU) 2024/1624 (AMLR)