NCA Cross-Border Cooperation 2026 — MiCA Supervision Guide

What The supervisory cooperation framework does

The MiCA framework sets the cooperation framework between EU National Competent Authorities for CASP supervision. The article matters most in two scenarios: cross-border passport supervision and home-host supervisor disputes. The framework is procedural in character but produces operational outcomes that shape how passporting works in practice.

The framework has five operational components:

1. Information sharing. NCAs share supervisory information relevant to CASP activity across borders.
2. Joint examinations. NCAs can coordinate joint examinations of CASPs operating across multiple member states.
3. Host-state precautionary powers. Host NCAs have limited powers to act where home NCA action is inadequate and host-state risk is real.
4. ESMA mediation. ESMA mediates disputes between home and host NCAs under Article 31 of the ESMA Regulation.
5. EBA coordination layer. EBA has supplementary coordination powers for ART issuers, EMT issuers above the significance threshold, and designated CASPs designated under Article 85.

Each component affects how supervision operates in practice.

Home-state primacy

The supervisory cooperation framework confirms the EU’s home-state supervision principle for CASPs. The home NCA — the supervisor of the member state where the CASP is authorised under Article 63 — has primary supervisory responsibility. The home NCA conducts ongoing prudential supervision, conduct supervision, AML oversight, and ICT resilience supervision across all activities of the CASP including those conducted under passport in other member states.

The home-state principle has operational benefits and operational risks.

Benefits. Single supervisor relationship across the CASP’s EU operations. Single reporting framework. Single fit-and-proper assessment. Coherent supervisory dialogue.

Risks. Home-state supervisor’s specific concerns affect EU-wide operations. Home-state enforcement action has EU-wide consequences. Home-state regulatory ambiguity creates uncertainty across all passport markets.

Operators choose home-state jurisdiction with operational consequences across the entire EU footprint. Choosing badly produces supervisor relationship risk that compounds across the passport scope.

Host-state role

The host NCA’s role is limited but real. Host NCAs have:

Information-receiving rights. Host NCAs receive notification of passport activity in their territory under Article 65 and receive supervisory information from the home NCA. Host NCAs maintain visibility of CASP activity in their member state.

Limited supervisory engagement. Host NCAs can engage with CASPs operating in their territory on host-state-specific issues — particularly host-state AML obligations, host-state consumer protection rules, and host-state market-integrity concerns. The engagement is bounded to host-state-specific matters.

Precautionary powers under Article 88(4). Where the home NCA’s action is inadequate and there is real risk to host-state customers or markets, the host NCA can take precautionary measures. The measures are temporary and require coordination with the home NCA and notification to ESMA. They are not unlimited host-state supervision but they are real.

Information-request rights. Host NCAs can request information from CASPs operating in their territory under specific circumstances. The requests must be proportionate and coordinated with home NCA supervision.

The host-state role is a balance between EU single-market passport principle and host-state legitimate supervisory interests. Operators that respect the balance — treating passport as primarily home-supervised but acknowledging host-state powers — manage cross-border supervision more cleanly than operators that treat passport as full host-state immunity.

Information sharing in practice

Routine information sharing operates through several channels:

ESMA register notifications. Authorisation grants, withdrawals, material changes, and enforcement actions feed into the ESMA-coordinated register. NCAs across the EU see the register data. Notifications operate effectively in real time.

Bilateral NCA channels. Direct NCA-to-NCA channels exist for supervisor-specific information exchange. Routine exchanges (passport notifications, supervisory cooperation requests, joint examination coordination) operate bilaterally with ESMA visibility.

ESMA-coordinated channels. For designated CASPs and cross-border systemic issues, ESMA coordinates information exchange across multiple NCAs simultaneously. The ESMA coordination role intensifies for cross-border enforcement matters and ART/EMT issuer concerns.

EBA channels for ART/EMT and designated CASPs. EBA-coordinated channels operate for token issuers and designated CASPs. EBA has direct supervisory information access for those categories under Articles 117-122.

The practical reality: supervisor concerns about a CASP travel across the EU quickly through these channels. Enforcement activity in one member state surfaces to other NCAs in days. Supervisor reservations communicated bilaterally between NCAs shape the cooperative supervision dynamic. Operators that assume member-state-by-member-state supervisor isolation misread the operational reality.

Joint examinations

Article 88(3) and the ESMA coordination framework support joint examinations of CASPs operating across multiple member states. Joint examinations operate in two main scenarios:

Material cross-border activity. Where a CASP authorised in one member state has substantial passport activity in another, NCAs can coordinate joint examination of specific operational areas. Common targets: AML framework in host-state customer base, conduct framework in host-state advisory or trading activity, ICT framework where host-state operations carry material technology risk.

Group-wide CASP examinations. Where a CASP group has authorised entities in multiple member states, NCAs can coordinate group-wide examination. Common targets: group governance, intra-group financial flows, group-wide risk management framework.

Joint examinations require formal coordination, joint examination plan, joint reporting framework, and clear allocation of supervisor responsibilities. The mechanics are demanding but the framework is operational. ESMA has produced examination coordination guidance to support consistent practice.

For operators, the principal implication is that group-wide CASP structures face group-wide supervisory engagement. Choosing a home-state supervisor does not insulate group-affiliated entities in other member states from coordinated examination.

ESMA mediation under Article 31

Where home and host NCAs disagree on a supervisory matter affecting a CASP, ESMA can mediate under Article 31 of the ESMA Regulation. The mediation framework is escalation-based with three principal levels:

Voluntary mediation. NCAs request ESMA mediation voluntarily. ESMA facilitates resolution between the supervisors. The mediation output is non-binding but produces strong soft-law pressure.

ESMA-initiated mediation. ESMA can initiate mediation where it identifies a supervisory dispute affecting EU-wide coherence. The mediation is voluntary in form but produces material soft-law pressure.

Binding mediation. In specific circumstances ESMA can issue binding decisions where bilateral mediation fails. The binding mediation is limited in scope but operational. Recent ESMA practice under similar mediation provisions in MiFID and AIFMD provides guidance on how the framework operates.

For ESMA-supervised designated CASPs under Article 85, the framework extends further — ESMA can take direct supervisory action including issuing instructions to the home NCA in some scenarios.

Practical implication for operators: home-host supervisor disputes are not theoretical. The mediation framework is operational. Operators caught in disputes face prolonged uncertainty until resolution. Building constructive relationships with both home and material host NCAs reduces dispute risk.

EBA coordination layer

For ART issuers under MiCA Title III, EMT issuers above the Article 56 significance threshold under Title IV, and CASPs designated as significant under Article 85, EBA has a supplementary coordination role beyond the standard the supervisory cooperation framework framework.

The EBA role includes:

Supervisory coordination chair. For significant ART issuers and large EMT issuers, EBA chairs a supervisory college that coordinates supervision across multiple home and host NCAs.

Direct supervisory information access. EBA has direct information access from large token issuers and designated CASPs, alongside the home NCA’s primary supervisor role.

Coordinated enforcement framework. Enforcement actions against large issuers and designated CASPs run through coordinated framework with EBA and home NCA participation.

Reporting framework coordination. EBA coordinates the regulatory reporting framework for token issuers and designated CASPs to produce consistent EU-wide data.

The EBA role is supplementary to home NCA primacy. The home NCA retains primary supervisory responsibility; EBA provides coordination scaffolding for cases where EU-wide coordination matters.

Practical takeaways

The procedure looks like supervisor cooperation procedure but produces operational outcomes that shape passport-based CASP operations. Three principles for operators:

Choose home-state supervisor on EU-wide implications, not member-state-isolated assessment. The home NCA’s supervisor temperament, dispute history, and EU-coordination behaviour all affect passport-based operations across the EU footprint.

Respect host-state legitimate interests. Host NCAs have real if limited powers. Building professional engagement with material host NCAs — particularly on host-state AML, consumer protection, and market integrity — reduces host-state friction and supports clean passport operation.

Plan for EU-wide supervisor visibility. Supervisor concerns travel quickly across NCAs through the information-sharing framework. Operators planning to manage supervisor relationships member-state-by-member-state misread the operational reality. EU-wide supervisor visibility is the working framework.

The supervisor cooperation framework is one of MiCA’s quieter but operationally important features. Understanding it produces cleaner passport-based operations and stronger supervisor relationships across the EU.

For corrections, updates, or counsel referrals on the supervisory cooperation framework cross-border CASP supervision, email [email protected].