European Union (EU) financial market regulators have notified unlicensed crypto service providers to immediately wind down their operations.

Blockchain outlet U.Today reported on Monday that the European Securities and Markets Authority (ESMA) issued final guidance saying crypto-asset service providers (CASP) operating in the EU without authorisation must begin procedures to end operations or face strong enforcement measures.

The key point is that the 18-month transition period under the Markets in Crypto-Assets (MiCA) rules ends on July 1. The fragmented system operating under country-by-country frameworks will end, leaving only a licensing system aligned with a single EU standard. ESMA made clear it will allow no exceptions after the transition ends.

The impact on the market is also expected to be significant. Industry data show that 75 percent to 83 percent of more than 1,200 firms that have operated under national regimes remain unlicensed even as the deadline approaches. With ESMA clearly ruling out an extension, the likelihood has increased that hundreds of platforms will have to withdraw from the European market.

Unlicensed firms cannot simply scale back services or continue operating quietly. ESMA required them to immediately wind down operations and implement strict exit plans to prevent user losses. They must immediately stop taking on new European users and halt all advertising in the region.

A minimum level of work to protect existing users is allowed. Platforms may keep only the functions needed for users to withdraw, transfer and sell digital assets. They are also required to provide customer guidance. Firms that are withdrawing must repeatedly notify users of the deadline and clearly explain procedures to move funds safely.

Security and anti-money laundering (AML) obligations also remain in place. ESMA did not exempt firms from regulation during market withdrawal. It said strict AML checks must continue during closure procedures and all withdrawal transactions must be reviewed to prevent illegal activity.

A warning for retail investors was also issued. ESMA stressed that if a platform remains unlicensed through July 1, user funds will no longer be protected under European law. Users should verify a provider's legal status through ESMA's temporary MiCA register and, if it lacks authorisation, immediately move assets to an approved platform or a personal wallet. Otherwise, there may be less time to respond before an account is forcibly closed.

The move is being read as a turning point as the EU crypto market fully shifts from country-by-country licensing to a single regulatory system. After July 1, authorisation will be the standard that determines whether a firm remains in the European market, and for users, checking registration status has become a higher priority than choosing a platform.