Key Takeaways
- Almost everyone in your purchase is now an anti-money-laundering “obliged subject”. Under Spain’s Law 10/2010, notaries, registrars, lawyers, developers and estate agents must run checks on you.
- They must identify you, your money, and any company behind a deal. That means ID, source of funds, and the beneficial owner of any corporate party.
- The checks are why your clean purchase has paperwork. You are not under suspicion; the system is.
- A central beneficial-ownership register now exists. Spain’s RCTIR has been live since September 2023, so corporate ownership is more visible than it used to be.
- Cooperate early and the checks are routine. Resist or arrive unprepared and they become delay.
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Buy a property on the Costa del Sol and you will be checked by several people you are paying. It can feel like being treated as a suspect. You are not. Spain’s anti-money-laundering regime makes the professionals around a sale legally responsible for screening it, and the screening lands on every buyer, clean or otherwise.
Last verified: 2026-06-25. Operational orientation, not legal advice. For why this exists, see dirty money and the Costa del Sol property market; for your side of it, see proof of funds when buying property in Spain.
Applies to: every buyer and seller in a Spanish property transaction
Timing: from your first serious engagement with an agent or lawyer through to the notary
Cost or penalty: delay, or refusal of service, if checks cannot be satisfied
Best next move: have ID, NIE and source-of-funds documents ready before you engage
The quick answer
Spanish law makes notaries, property registrars, lawyers, developers and estate agents “obliged subjects”: they must identify who you are, verify where your money came from, and establish the real owner of any company involved, then keep records and report anything suspicious. None of it is optional for them, which is why it is not optional for you. Bring the documents, answer the questions, and it is a routine afternoon. Arrive unprepared and it is a stalled completion.
Who is checking you, and why
Under Law 10/2010, the businesses involved in a property sale are legally bound to run anti-money-laundering checks. That list includes the notary who authorises the deed, the property registrar, your lawyer, the developer of a new build, and the estate agent. Each is personally exposed to penalties if they skip it, so they will not.
What they must establish
- Identity (KYC). Passport, NIE, proof of address, tax-residency status.
- Source of funds. Documented legal origin of your purchase money. This is the big one, covered in full in proof of funds.
- Beneficial ownership. If a company is buying or selling, who the real human owner is. See who really owns that property.
The beneficial-ownership register changed the game
Spain now runs a Central Register of Beneficial Owners (the RCTIR), operational since September 2023, and since February 2025 companies must declare their beneficial owner to the Tax Agency on relevant corporate changes. Corporate ownership of property, once an easy way to obscure who was behind a deal, is more visible than it has ever been. For a buyer, that is good news: it is easier to find out who is really on the other side of the table.
How to make it painless
- Prepare before you engage. ID, NIE and source-of-funds folder ready before you instruct an agent or lawyer.
- Expect repetition. The agent, the lawyer and the notary may each ask. It is not disorganisation; each is separately obliged.
- Do not take it personally. The checks are systemic. Cooperating fast marks you as the easy, clean buyer everyone prefers.
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Your next step
- If you can handle it yourself: get your source-of-funds folder ready and run the due-diligence checklist.
- If you want it on your radar: understand beneficial ownership before dealing with a corporate seller.
- If it is already stuck: a completion stalled on checks is a job for Navigator.
Frequently asked questions
Why do estate agents in Spain ask for my passport and source of funds?
Because Spanish law makes them anti-money-laundering “obliged subjects”. They must identify buyers and verify the origin of funds, or face penalties.
Who runs AML checks in a Spanish property purchase?
The notary, the property registrar, your lawyer, a new-build developer, and the estate agent, each independently under Law 10/2010.
Can a property purchase be refused over AML?
Yes. An obliged subject can decline to proceed if identity, source of funds, or beneficial ownership cannot be established.
