Crypto Lawyers in Spain: Crypto-Assets & Blockchain

We are crypto lawyers in Spain providing expert legal advice on crypto-assets and blockchain: MiCA compliance, AML/CFT, the Travel Rule, on-chain traceability and defense against information requests, so you can operate with legal certainty.

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Crypto compliance for every business model

Exchanges, custodians, DeFi platforms, token issuers or investors: each profile needs different controls and evidence.

Exchanges / CASP

MiCA + AML without slowing down your business

"We turn requirements into real processes: onboarding, scoring, evidence and ongoing review. Practical compliance, not 'paperwork'."

On-chain & Off-chain

Traceability and source of funds

"We build verifiable dossiers: on-chain analysis, off-chain documentation and a consistent narrative for banks, investors or audits."

Travel Rule

Data, risk and evidence

"We design flows and criteria to share information in a controlled way, minimizing friction and maximizing traceability."

Web3

Governance and smart contracts

"We review operational risks, roles, controls and documentation. Less exposure, greater ability to respond."

Why act now on crypto and blockchain compliance?

Crypto regulation is getting tougher: MiCA, the AMLR and the Travel Rule are already in force. Non-compliance blocks your operations, your access to banking and your reputation.

Significant penalties for non-compliance: heavy fines and the risk of an operational shutdown for VASPs/CASPs without adequate controls.

Tougher KYC/EDD expectations, plus on-chain analysis, source-of-funds checks and the Travel Rule to deal with counterparties.

Growing requirements for digital documentation and record-keeping of evidence (customers and beneficial owners).

MiCA / CNMV Cessation of activity

Providing crypto services without CASP authorization: suspension of activity, fines and public disclosure of the breach.

De-banking Loss of banking access

Banks, investors and partners cut ties if there are no verifiable AML controls, traceability and governance.

AMLR / Law 10/2010 up to €10,000,000

Penalties for very serious AML/CFT infringements applicable to crypto-asset service providers.

Need legal certainty in crypto-assets & blockchain?

We help you with regulation, AML compliance, the Travel Rule, MiCA, traceability and defense against information requests, so you operate with evidence and sound judgment.

Crypto lawyers in Spain: common questions on crypto-assets and blockchain

What are crypto and blockchain legal services?

Legal and technical advice covering the regulatory, contractual and compliance aspects of crypto-assets and blockchain technology.

It includes token classification, the legal structuring of Web3 projects, AML/CFT policies, contract review and support before supervisors. The goal: to operate with sound judgment, evidence and legal certainty.

Which companies or projects need this advice?

Exchanges, custodians, wallet providers, token issuers, DeFi/CeFi platforms, crypto payment businesses, tokenized asset managers, NFT marketplaces and family offices/investors with crypto exposure.

If you intermediate digital assets or handle fiat↔crypto flows, compliance is no longer optional.

What do crypto and blockchain legal services include?

Regulatory and risk assessment, design of on-chain and off-chain KYC/EDD programs, the Travel Rule, counterparty due diligence, terms and conditions, smart contract review, licensing/registration and support in investigations and sanctions proceedings.

Always with a practical approach: processes, designated owners and evidence.

What is an external crypto compliance audit?

An independent (legal and technical) review that assesses how effective your compliance program is: KYC/EDD, monitoring, on-chain traceability, governance and internal policies.

It helps you detect gaps and serves as documentary evidence for audits or supervisors.

Why is specialized training key in blockchain?

Risk in crypto does not behave the way it does in traditional finance: on-chain patterns, mixers/bridges, complex structures and smart contract vulnerabilities.

Training + evidence = fewer operational errors and a stronger defense when you are reviewed.

What are the risks if I don't comply?

Penalties, blocked operations, disqualifications, reputational damage, loss of banking access and exposure to incidents due to missing AML controls and governance.

Prevention is cheaper than reacting late, especially as supervision intensifies.

What is MiCA and how does it affect my crypto project?

The MiCA Regulation (Markets in Crypto-Assets) sets a single EU regulatory framework for crypto-asset service providers (CASPs). It requires authorization and compliance with governance, capital, custody and transparency requirements.

If you operate as an exchange, custodian or crypto service platform, you need to comply with MiCA to keep operating and to access the EU passport.

What is the Travel Rule and why does it matter?

The Travel Rule requires crypto-asset service providers to share originator and beneficiary information on transfers. It is key to complying with AML rules and dealing with counterparties.

Without the Travel Rule in place, transfers can be blocked and your relationships with banks and other CASPs become harder.

A practical guide to crypto compliance

Crypto compliance is not just "having a manual": it is a set of workable controls adapted to on-chain and off-chain activity, backed by verifiable evidence. The key is a risk-based approach applied to digital assets.

AML/CTF

What crypto compliance is for

Reducing the risk of money laundering, illicit finance and fraud in crypto-asset transactions through tailored controls, on-chain traceability and evidence you can defend before supervisors.

MiCA / CASP

Minimum required controls

KYC/EDD, on-chain analysis, the Travel Rule, governance, capital and custody requirements, internal policies and an escalation channel. All documented and auditable.

Evidence

What makes the difference

A crypto compliance program is proven by how it is executed: alert logs, on-chain analysis, justified decisions, minutes and periodic reviews are the first things examined.

Crypto compliance checklist in 10 steps

  1. Regulatory assessment: your business model (exchange, custody, wallet, DeFi, payments) and the rules that apply to it.
  2. Token classification: utility, security, NFT, stablecoin and the related obligations.
  3. AML/CFT program: KYC/EDD adapted to on-chain and off-chain activity, with roles and procedures.
  4. Travel Rule: data flows, risk-based criteria and evidence for dealing with counterparties.
  5. Traceability and source of funds: verifiable dossiers with on-chain analysis and supporting documentation.
  6. MiCA/CASP readiness: governance, documentation, capital and controls for registration/licensing.
  7. Screening: sanctions, PEPs, blacklists and adverse media alerts.
  8. On-chain monitoring: rules, thresholds, mixers/bridges, suspicious patterns and alert management.
  9. Smart contracts and governance: review of operational risks, roles, controls and documentation.
  10. Audit and continuous improvement: periodic reviews, corrective actions and up-to-date evidence.

If you need to put crypto compliance into practice, see our crypto legal services or, for an independent review, the external expert report.

Crypto in day-to-day operations

Crypto compliance: from "ticking the box" to controlling risk with evidence

An effective crypto compliance program is not a document: it is a set of repeatable decisions (on-chain KYC, Travel Rule, traceability, monitoring and escalations) with a full audit trail. Here is a visual overview of how it works in practice.

On-chain and off-chain KYC for crypto-assets1) Onboarding

Crypto KYC: on-chain + off-chain

Identification and verification adapted to digital assets: traditional documentation + wallet analysis, on-chain history and risk scoring.

  • Identity verification
  • Wallet analysis
  • Crypto risk scoring
On-chain traceability and source of funds2) Traceability

Source of funds: the fiat↔crypto bridge

Verifiable dossiers that combine on-chain analysis with off-chain documentation for banking access, audits and investors.

  • On-chain analysis
  • Off-chain documentation
  • Consistent narrative
Travel Rule and crypto transaction monitoring3) Ongoing

Travel Rule + on-chain monitoring

Data flows between counterparties, detection rules, mixers/bridges and alert management with a full audit trail.

  • Travel Rule data sharing
  • Detection of suspicious patterns
  • Alert handling and closure
Decision map: crypto controls by risk levelQuick decision

Practical crypto map: what to do at each risk level

Low risk

Standard KYC + basic wallet verification + periodic review.

Medium risk

On-chain analysis + Travel Rule + enhanced controls + evidence.

High risk

EDD + verified source of funds + internal escalation + intensive monitoring.

Contact us External expert report
Crypto playbook

Crypto compliance in practice

Control
What is expected
Typical evidence

On-chain/off-chain KYC

Identity verification + wallet analysis, risk scoring and periodic updates.

KYC file, wallet report, risk profile and review date.

On-chain traceability

Analysis of fund flows, identification of mixers/bridges and a verifiable narrative.

On-chain report, off-chain documentation, source-of-funds dossier.

Travel Rule

Sharing originator/beneficiary data with counterparties on a risk basis.

Transfer log, data shared, exceptions and justifications.

MiCA / CASP

Authorization, governance, capital, custody, transparency and internal policies.

Authorization application file, policies, contracts, controls and governance minutes.

Audit + improvement

Periodic program reviews, gap detection and corrective actions.

Audit reports, remediation plan, KPIs and evidence of improvement.

Typical red flags in crypto transactions

Indicators to adjust your controls and justify enhanced due diligence.

  • Wallets linked to mixers, tumblers or obfuscation services.
  • Fragmented transfers (structuring) or transfers with no clear economic rationale.
  • Reluctance to provide KYC documentation or information on the source of funds.
  • Transactions involving high-risk jurisdictions or jurisdictions with no crypto regulatory framework.
  • Frequent changes of wallets or beneficiaries, or volumes inconsistent with the customer's profile.
Working glossary

Key concepts in crypto and blockchain

If you are implementing crypto compliance, these terms come up in audits, with regulators and in day-to-day operations. Understanding them well helps you design workable controls.

MiCAEU regulation

Markets in Crypto-Assets

EU regulation that sets the authorization, governance and compliance framework for crypto-asset service providers (CASPs).

Useful for: exchanges, custodians, token issuers.
CASPLicense

Crypto-Asset Service Provider

A provider of crypto-asset services subject to authorization and supervision under MiCA: exchanges, custodians, trading platforms and advisers.

Typical evidence: authorization application file + policies.
Travel RuleData

Crypto travel rule

The obligation to share originator and beneficiary data on crypto-asset transfers between service providers.

Typical evidence: transfer log + data shared.
On-chain KYCOnboarding

Crypto-adapted verification

Customer identification that combines traditional documentation with wallet analysis, on-chain history and risk scoring.

Key: wallet + identity + risk profile.
TraceabilityOn-chain

Fund flow analysis

Tracking the origin and destination of crypto-assets with blockchain analytics tools to document provenance and detect risks.

Typical evidence: on-chain report + supporting dossier.
Mixer / TumblerRed flag

Obfuscation service

Tools that mix transactions to make them harder to trace. Their use by customers is a red flag that calls for enhanced analysis.

E.g.: documented decision rationale + escalation.
DeFiWeb3

Decentralized finance

Financial protocols built on smart contracts without centralized intermediaries. They raise specific regulatory challenges in AML and governance.

Regulatory outlook: AMLR + MiCA 2.
Security TokenTokenization

A token that qualifies as a transferable security

A digital asset representing economic or governance rights comparable to those of a financial instrument. Subject to MiFID II and securities market rules.

Typical evidence: legal classification opinion.
Banking accessFiat↔Crypto

Access to banking services

The ability to work with banks while having exposure to crypto-assets. It requires traceability, a documented source of funds and verifiable AML controls.

Outcome: dossier + narrative + evidence.
Free resource · PDF

Download the 10-Step Crypto Compliance Checklist

The 10 controls that exchanges, custodians, token issuers and crypto projects must implement under MiCA, the AMLR and the Travel Rule, with the evidence expected for each one.

  • The 10 steps of a crypto compliance program
  • The evidence expected for each control (CASP / AML / Travel Rule)
  • References to MiCA, the AMLR and Law 10/2010
  • Professional PDF · 7 pages

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Crypto regulation in Spain and the EU: MiCA, AMLR and Law 10/2010

The regulation of crypto-assets and blockchain in Spain and the European Union has undergone a structural shift with the entry into force of the MiCA Regulation (Markets in Crypto-Assets), which sets a harmonized framework for the authorization, governance and supervision of crypto-asset service providers (CASPs). MiCA compliance in Spain means obtaining a license and meeting capital, custody, transparency and internal policy requirements.

Crypto AML in Spain: obligations for crypto providers

Crypto-asset service providers are obliged entities for anti-money laundering purposes under Law 10/2010 and the new EU Anti-Money Laundering Regulation (AMLR). This means KYC/EDD adapted to on-chain and off-chain activity, transaction monitoring, sanctions and PEP screening, and reporting suspicious transactions to SEPBLAC (Spain's Financial Intelligence Unit).

Travel Rule and traceability

The Travel Rule (the Transfer of Funds Regulation, extended to crypto-assets) requires CASPs to share originator and beneficiary information on every transfer. In addition, on-chain traceability has become a de facto standard for proving the source of funds, gaining access to banking and passing audits.

Crypto tax in Spain

The taxation of crypto-asset transactions (swaps, staking, DeFi, airdrops, mining) requires sound judgment, supporting documentation and consistency with your tax return. Form 721 (Modelo 721) requires you to report cryptocurrencies held abroad, and the Spanish Tax Agency (AEAT) is stepping up its checks on the origin, valuation and taxation of digital assets.

Supervision and registration in Spain

The Bank of Spain kept the register of virtual currency exchange and custodial wallet providers until the Spanish MiCA transitional period ended on 30 June 2026. The CNMV (Spanish Securities Market Commission) is the competent authority under MiCA for authorizing and supervising CASPs: since 1 July 2026, only CASPs authorized by the CNMV or passported from another EU Member State may operate in Spain. Both regulators are stepping up their inspection and enforcement activity.

MiCA AMLR Law 10/2010 Travel Rule SEPBLAC CNMV Modelo 721 FATF