The European Union's Markets in Crypto-Assets Regulation (MiCA) moved into its enforcement phase for stablecoin issuers on June 30, 2024, imposing licensing, reserve and disclosure rules on firms issuing asset-referenced tokens (ARTs) and e-money tokens (EMTs) in the bloc. The transition, anchored in Regulation (EU) 2023/1114, sits at the center of a new explainer from The Cryptonomist that maps the compliance deadlines now binding issuers, exchanges and custodians operating in Europe's single market.

How MiCA sorts stablecoins

MiCA splits euro-denominated tokens into two regulatory tracks. Title IV treats single-currency tokens as e-money tokens, requiring issuers to hold an electronic money institution license and back outstanding supply one-for-one with low-risk liquid assets held in segregated custody with a credit institution. Title III covers asset-referenced tokens tied to a basket of fiat currencies, commodities or crypto-assets, with prudential authorization calibrated to the diversification and risk profile of the underlying pool.

Both regimes compel issuers to publish a MiCA-formatted "white paper" and to grant holders redemption rights at par value. The European Securities and Markets Authority (ESMA) and the European Banking Authority (EBA) published Level 2 technical standards in mid-2024 detailing reserve composition, segregation requirements and stress-testing expectations that now apply day to day.

What changes for exchanges

Virtual asset service providers operating in the EU must confirm that any euro-pegged token traded on their venue originates from a MiCA-authorized issuer. Coinbase Europe, Kraken's Dutch-registered entity and several Italian venues delisted Tether's USDT before the June 30, 2024 cutover, citing the absence of EMT authorization for the issuer. Tether had previously indicated it would not pursue registration under the framework, narrowing the practical universe of compliant dollar- and euro-denominated tokens available to EU retail traders.

Circle Internet Group entered the new regime from a position of relative strength. Its French unit, Circle France SAS, obtained an electronic money institution license from the Autorité de Contrôle Prudentiel et de Résolution (ACPR), enabling the firm to issue USDC under MiCA and to passport that status across the union's 27 member states. Société Générale-Forge, the digital-asset arm of the French bank, secured a comparable authorization for its EURCV euro stablecoin, while German lender DWS and several fintechs have signaled parallel EMT or ART filings.

Reporting and accountability

ART and EMT issuers must file regular reserve reports with their national competent authority and publish a breakdown of reserve composition on their website at least every six months, alongside a description of the custody arrangements securing those assets. Issuers meeting the EBA's thresholds — denominated in holder count, market capitalization and transaction volume — are designated "significant" and face additional cross-border supervision coordinated by EBA, with ESMA consulted on market-conduct and disclosure matters.

Non-compliance exposes issuers to administrative fines, public censure or forced wind-down. National regulators retain the power to order exchanges and brokers to suspend trading in unauthorized tokens, a remedy already exercised against USDT listings in multiple EU jurisdictions during the second quarter of 2024.

What's next

The remaining MiCA provisions covering crypto-asset service providers (CASPs), trading venues and broader market-integrity rules apply from December 30, 2024. ESMA's transitional regime allows firms that were operating before that deadline to continue serving clients while their CASP authorization applications are reviewed, a window that closes to new entrants on the date itself.

As the second phase concludes, supervisory follow-up is set to intensify through 2025, with national regulators, ESMA and EBA flagging reserve attestation quality, redemption-window liquidity and the cross-border distribution of unauthorized tokens through offshore platforms still accessible to EU residents as standing enforcement priorities.