Crypto and Digital Assets Criminal Defense

Criminal defense in crypto assets requires combining mastery of the classical Criminal Code —fraud, money laundering, tax offense, terrorist financing— with technical understanding of how blockchain networks function and of the new European regulatory framework (MiCA Regulation EU 2023/1114). The criminal lawyer assuming a crypto case must articulate a multidisciplinary defense: legal, technical (blockchain expert) and financial (fund tracing).

Recurring Criminal Typology

Criminal proceedings involving crypto assets concentrate on five major types: (1) Crypto frauds —fraudulent ICOs, rug pulls, pyramid schemes (Art. 248)—; (2) Money laundering through mixers, cross-chain bridges or conversion to fiat (Art. 301); (3) Tax offense for not declaring capital gains or using Form 721 (Art. 305); (4) Terrorist financing with privacy coins (Art. 576); and (5) Corporate and director offenses when the company holds or invests in crypto without authorization.

MiCA Regulation (EU 2023/1114)

The MiCA Regulation (EU 2023/1114), fully applicable since 30 December 2024, creates a harmonized European regime for CASPs (Crypto Asset Service Providers). Non-compliance by an EU company may generate, in addition to administrative sanctions from the CNMV, criminal liability of the legal entity and its directors. A revision of this framework (informally referred to as "MiCA II") is under discussion but has not yet been approved.

Phases of Defense in a Crypto Case

An effective defense unfolds in phases: (1) Evidence preservation —forensic capture of wallets, transactions and devices before they are altered—; (2) Typicity analysis —determining whether the facts fit a criminal type or are market contingency—; (3) Technical counter-expertise —challenging the prosecution's on-chain tracing—; (4) Patrimonial and tax strategy —reconstructing the lawful origin of funds and, where appropriate, regularizing—; and (5) Reparation —restitution or consignment that activates mitigating factors—. Each phase demands coordination between the criminal lawyer, the blockchain expert and the tax adviser.

International Dimension of the Crypto Case

Most crypto-asset proceedings have a cross-border component: exchanges based abroad, wallets without physical location, and investigated parties or victims in different countries. Spanish jurisdiction is competent when the victim resides here or the result occurred on national territory. Obtaining evidence and freezing funds outside the EU is channeled through the European Investigation Order (EIO), letters rogatory, the Budapest Convention on cybercrime and the cooperation of Europol and Eurojust.

Defrauded with Cryptocurrency? Steps to Claim

If you have been the victim of a crypto-asset fraud —a fake investment platform, a manager who disappears with the funds, wallet phishing—, the order in which you act conditions the chances of recovery. The essential steps are:

• Preserve evidence immediately: transaction hashes, source and destination wallet addresses, screenshots of the platform and the conversations, bank transfer receipts and the entire recruitment process (ads, profiles, emails).
• Criminal complaint (denuncia) or formal accusation (querella): the complaint before the National Police, the Guardia Civil or the court opens the investigation; the querella, more complete, allows proposing investigative measures from the outset (identification of wallet holders, requests to exchanges, tracing expert evidence).
• Freezing funds at exchanges: when on-chain tracing locates the funds at a crypto-asset service provider, the court is asked to order their freezing and the production of the holder's KYC file. With CASPs authorized by the CNMV or another EU authority the request is direct; if the exchange is outside the EU, it is channeled through the European Investigation Order, the Budapest Convention or letters rogatory.
• Joining the proceedings as private prosecution (acusación particular): it allows driving the investigation, proposing blockchain expert evidence and claiming civil liability (restitution of the crypto assets or equivalent compensation) within the same criminal proceedings.

Time is the critical factor: the sooner the destination exchange is identified, the better the chances of freezing the funds before they are dispersed through mixers or bridges into non-cooperative jurisdictions.

MiCA: End of the Transitional Period on 1 July 2026

The Spanish transitional period of the MiCA Regulation ends on 1 July 2026. From that date, only providers (CASP) authorized by the CNMV or by another European Union authority may provide crypto-asset services on the Spanish market. The CNMV also publishes a list of non-authorized entities, and the Spanish Tax Agency (AEAT) released its administrative criteria on crypto assets in April 2026.

This milestone has three criminally relevant consequences. For the investor, contracting with an unauthorized platform after that date is a first-order red flag and, in fraud proceedings, it strengthens the proof of deception where the platform pretended to be regulated. For companies in the sector, continuing to operate without authorization exposes them to administrative sanctions and, where deception of clients or concealment of the situation concurs, may lead to criminal liability of the legal entity and its directors. For the defense, having operated through an authorized CASP, with complete KYC and documented traceability, makes it easier to establish the lawful origin of the funds and the user's good faith.

Amounts and Aggravating Factors: How the Penalty Changes

In crypto-asset fraud, the defrauded amount determines the penalty leap. The basic type (Articles 248 and 249 CP; computer fraud under Article 249.1.a) CP punishes the non-consented transfer of assets through computer manipulation) carries imprisonment of six months to three years. If the amount does not exceed 400 euros, the penalty is a fine of one to three months, although, after Organic Law 1/2026, three or more prior enforceable convictions for offenses of the same nature allow imposing the penalty of the basic type.

Article 250.1 CP raises the penalty to imprisonment of one to six years plus a fine of six to twelve months when, among other circumstances, the value of the fraud exceeds 50,000 euros or affects a large number of people —the usual scenario in pyramid schemes and fraudulent ICOs—, is of special gravity given the extent of the harm, or is committed abusing personal relationships or exploiting the perpetrator's business or professional credibility (the fake investment adviser pattern). Article 250.2 CP provides for imprisonment of four to eight years plus a fine of twelve to twenty-four months when the value of the fraud exceeds 250,000 euros or certain aggravating circumstances are combined. In crypto, fixing the amount requires valuation expert evidence: given the volatility of these assets, the date at which the defrauded amount is valued (the moment of the act of disposition or a later one) is frequently the subject of technical and legal debate.

Statute of Limitations and Deadlines

Under Article 131 CP, basic fraud (maximum penalty of three years' imprisonment) becomes time-barred after five years; the aggravated forms of Article 250 CP (maximum penalties of six and eight years) become time-barred after ten years, as does money laundering under Article 301 CP. The clock starts on the day the offense is committed and, in continuing offenses —usual in crypto frauds with successive contributions by the investor—, from the last infringement (Article 132 CP).

Filing a complaint or querella against a specific person suspends the limitation period for up to six months; definitive interruption requires a reasoned judicial decision attributing presumed participation to the suspect. In practice, the real risk is usually not limitation but the volatility of the evidence: exchange KYC records and logs are kept for limited periods, funds move within hours and the domains of fraudulent platforms disappear. That is why we work to ensure that the first investigative measures —data preservation requests and fund freezing— are requested as early as possible.