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Source of funds when buying Portuguese property with crypto

Which documents are collected, who asks for them and why, what cannot be reconstructed after the fact, and why the pack is prepared before the deposit.

In short

  • Source-of-funds checks are a legal duty of the provider, not an inconvenience they invented. The governing act is Lei n.º 83/2017, Portugal's anti-money-laundering law.
  • In December 2025, Lei n.º 70/2025 added specific rules for transfers involving self-hosted addresses: the provider must apply enhanced measures and obtain additional information on where the crypto-assets came from.
  • Crypto-asset service providers established in Portugal are expressly listed as obliged financial entities.
  • Records are kept for seven years. Identification is mandatory for occasional transactions from EUR 15,000.
  • The pack is prepared before the CPCV is signed and the deposit paid. This is the single piece of advice here that saves the most money.
Checked 21 September 2026

Why anyone asks

The check does not come from the agency or the seller. Lei n.º 83/2017 obliges a wide set of entities — banks, notaries, real-estate agencies and, as a separate item, crypto-asset service providers established in Portugal — to identify the client and obtain information on the origin and destination of funds where the risk profile or the nature of the operation calls for it.

For crypto transactions the bar is higher than usual. The law expressly requires obliged entities to pay particular attention to risks arising from products that may favour anonymity and from new technologies.

In December 2025 Lei n.º 70/2025 added a specific provision on self-hosted addresses — that is, your own wallet, not held at an exchange. For transfers whose origin or destination is such an address, the provider must apply enhanced measures, and these expressly include obtaining additional information on the origin and destination of the crypto-assets and verifying the identity of the originator or recipient.

Put simply: moving assets from your own cold wallet will draw more questions than assets sitting on an exchange with a history. This is not suspicion directed at you; it is a direct legal requirement on the provider.

What is usually collected

There is no single list — the depth depends on the amount, the complexity of the assets' path and the risk profile. But the set is almost always the same:

  • where the assets came from: purchase, business income, sale of a stake, mining, compensation;
  • when they were acquired and at what price;
  • which exchanges and platforms were used, and exported statements from them;
  • which wallets you control, and proof of that control;
  • transfers between your own wallets — you need to explain them and show both ends are yours;
  • documents supporting the economic reason you received the assets: contracts, invoices, tax returns, statements;
  • a link tying the whole history to your identity.

On proving wallet control: this is normally a message signed with the private key, or a micro-transfer to an address the provider specifies. A screenshot of a balance is not proof.

Where deals actually break

Screenshots instead of exports. A set of images from a wallet app and a signed transaction-history export are not the same thing. The first is almost never accepted. Old assets with no trail. Bitcoin bought in 2016 peer-to-peer for cash is economically honest and almost undocumentable. This is the hardest case, and it has to be worked out before you pay a deposit, not after. Mixed wallets. If assets have moved repeatedly between your own addresses, exchanges and protocols, reconstructing the chain after the fact is slow and expensive. A closed exchange. If the platform you bought through has shut down or left the EU, there is nowhere to pull the export from. Export your history while you still have access. Deposit paid before the documents exist. The most common and most expensive mistake. The CPCV clock starts while the pack is still being assembled — the deal either slips or collapses with the deposit lost.

What cannot be fixed retroactively

Some things do not come back, and it is fairer to know that upfront:

  • the transaction history of a closed exchange, if you did not export it in time;
  • proof of origin for assets received anonymously with no counterpart document;
  • control of a wallet whose private key is lost.

If one of these describes you, it is not necessarily a dead end — but it changes the structure and the timeline, and it belongs in the first conversation.

The order that works

  • First, a rough assessment: which assets, from where, how old.
  • Then assemble the pack and get a preliminary review from the provider.
  • Only then the CPCV, the deposit, and deadlines tied to real readiness.
  • Then settlement, the escritura and registration.

What does not exist

There is no anonymous property purchase with crypto. Identity and source-of-funds verification is not an option that can be switched off for a fee; it is a duty on the provider, and the law sets fines running to several million euro for legal persons who fail it.

Any material promising a way around these checks is describing either something that does not exist, or something that creates far worse problems for the buyer than the inconvenience of gathering documents.

Sources

This is information, not legal advice. The exact pack for your situation is determined by the provider handling the regulated leg.
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