European crypto regulation is moving from establishing a framework toward enforcing requirements in day-to-day operations. On October 8, 2026, the European Securities and Markets Authority (ESMA) published an opinion clarifying supervisory expectations for crypto-asset services involving stablecoins that do not comply with the Markets in Crypto-Assets Regulation (MiCA). The opinion covers asset-referenced tokens (ARTs) and e-money tokens (EMTs), two categories relevant to the EU's stablecoin framework.
The guidance has practical implications for authorised crypto exchanges, custody providers, transfer services and other crypto-asset service providers operating in the European Union. Platforms cannot rely solely on a stablecoin's market demand, liquidity or popularity when deciding whether to continue offering services. They must also assess the token's regulatory status and determine whether their activities fall within the scope of the opinion.
ESMA's publication is a supervisory opinion clarifying regulatory expectations, rather than a separate standalone law. Businesses should interpret it alongside the existing MiCA framework, applicable national supervisory requirements and the scope of their authorisations.
What Does ESMA Require for Non-Compliant Stablecoins?
ESMA states that crypto-asset service providers authorised under MiCA should cease providing services to EU clients involving stablecoins that do not comply with MiCA requirements. The services covered include trading platform operation, crypto-asset exchange, order execution, transfers, custody and administration, as well as other services falling within MiCA's scope.
The issue extends beyond whether a platform directly lists a particular token. ESMA expects national competent authorities to supervise market participants so they do not maintain, introduce or facilitate client access to non-compliant stablecoins through their services. Platforms therefore need to review listing procedures, trading routes, wallet functions, custody arrangements and customer interfaces to identify whether users can still acquire the affected tokens or increase their exposure.
Stablecoin compliance should not rely exclusively on a token's name or an issuer's public statements. Providers need a repeatable assessment process that considers the issuer's regulatory status, the token’s legal classification and the applicable requirements. Businesses operating across multiple jurisdictions should also ensure that controls for EU clients are clearly defined. Availability in another market does not automatically mean that a token can be offered to EU customers under the same conditions.
How Should Platforms Handle Existing Client Holdings?
ESMA's opinion also addresses existing exposures. Where national competent authorities identify remaining exposures, they should require remediation as soon as possible and no later than three months after the opinion's publication. The practical implementation will depend on supervisory arrangements and individual circumstances. Platforms should not interpret this period as unconditional permission to continue all related services for three months.
Any continuation of services should be strictly limited to activities necessary for liquidation, conversion, withdrawal, transfer or safekeeping. These arrangements should be time-limited, risk-based and closely supervised. Providers therefore need to distinguish operations required to help customers exit their positions from trading activities that could allow them to increase their exposure.
A practical remediation plan should begin with an inventory of affected tokens, client accounts, outstanding orders and relevant wallet addresses. Platforms can then define trading restrictions, customer notifications, conversion or withdrawal procedures, and documentation requirements. Complex accounts and multi-chain assets may require manual review and escalation procedures to reduce the risk of incomplete remediation.
How Can KYT and Internal Controls Support MiCA Compliance?
As token eligibility requirements evolve, platforms need to translate compliance decisions into technical controls and operational procedures. Know Your Transaction (KYT) tools can help analyse fund flows, address relationships and high-risk transaction activity, supporting monitoring and investigations. However, KYT cannot independently determine whether a token satisfies every legal requirement under MiCA, nor can it replace legal review or verification of an issuer's regulatory status.
Businesses should establish an asset-approval process involving compliance, legal, product and engineering teams. Supported-token lists should be reviewed regularly, and trading systems, wallet services and customer interfaces should use consistent asset-status information. Where services must cease, controls should cover purchases, exchanges, order execution and relevant transfer services while preserving any necessary exit activities permitted under supervisory expectations.
Platforms should also retain records of assessment criteria, approval decisions, restrictions and customer communications to support internal audits and regulatory reviews. ESMA's opinion highlights the growing importance of turning EU stablecoin rules into enforceable operational controls. For authorised providers, verifying token eligibility, managing existing exposures and maintaining an auditable remediation process are essential steps toward reducing regulatory risk.