Europe is closing one of the last gaps in its crypto rulebook. On October 8, the European Securities and Markets Authority (ESMA) published an opinion telling national regulators that authorized crypto platforms should stop offering services for stablecoins that do not comply with the Markets in Crypto-Assets Regulation, known as MiCA. Regulators should resolve any remaining customer holdings as soon as possible and no later than three months after publication, a date CoinDesk puts at January 8, 2027.

The opinion does not name any tokens. But CoinDesk reports that the most prominent affected stablecoin is Tether's USDT, the largest by market value, and that PayPal USD is also not authorized under MiCA. For many users and for exchanges that built their euro-area business around dollar stablecoins, that is a significant change.

What MiCA already required

MiCA's stablecoin rules began applying in June 2024. They require issuers of dollar- and euro-pegged tokens offered in the EU to meet authorization, reserve, redemption, and disclosure requirements. CoinDesk adds that the regulation's full rules for crypto platforms took effect July 1, which forced unauthorized firms to stop serving EU clients. Several platforms had already restricted USDT for European users before the new opinion, and the report links to an earlier case of an exchange suspending Tether and PayPal stablecoin services in Europe.

The gap ESMA is addressing is subtle. An exchange can be fully licensed under MiCA and still list a stablecoin whose issuer is not. In ESMA's view, according to the report, letting licensed platforms keep serving those tokens would weaken the reserve, redemption, governance, and disclosure rules that apply to authorized issuers. The opinion closes the gap from the platform side.

What platforms must stop, and what they can still do

The opinion applies to authorized crypto-asset service providers and covers exchange, trade execution, transfers, custody, administration, advice, and portfolio management. Purchases, promotion, trading, and continued market availability of non-compliant tokens are not allowed. During the wind-down, platforms may offer limited services so customers can sell, convert, withdraw, transfer, or safekeep what they already hold.

ESMA issued the opinion to national authorities, which supervise platforms day to day and are the ones expected to enforce the three-month limit. In practice that means timelines can vary by country and by platform. The report does not say which exchanges will act first, and it names no platforms as subject to a specific order.

What it means for users

A user in the EU holding USDT on an exchange should expect messages from the platform about how and when to sell, convert, or withdraw. Some platforms may offer a window up to the full three months; others may cut off earlier. Withdrawing to a self-custody wallet remains possible under the opinion's allowance for transfers, though platforms set their own rules. As reported, the opinion targets what licensed service providers may offer, not private holding. The report gives no figures on market impact.

The U.S. contrast

The EU is moving by prohibition on the platform side. The U.S. is moving by authorization on the issuer side, under the GENIUS Act, whose implementing rules we covered in the Fed's proposed stablecoin rulebook. The two approaches will eventually meet where the same token is offered on both sides of the Atlantic. Tether's position is also under scrutiny in Washington, as in our report on Sen. Blumenthal's questions to Tether's U.S. banker. For anyone new to the term, our glossary defines stablecoin.

What an ESMA opinion is, and is not

An ESMA opinion is not a new law. The rules themselves are in MiCA, and ESMA's opinion explains how national authorities should apply them so that supervision is consistent across the EU's member states. It is addressed to those authorities, not directly to exchanges, which is why the practical details, including how fast any single platform moves, will come from national regulators and the platforms themselves. The three-month limit is the part with a date attached, and it is the date to watch: January 8, 2027, according to CoinDesk's calculation.

Why it matters

Europe's approach tests whether a large jurisdiction can enforce reserve and redemption standards on a stablecoin market dominated by one issuer. If platforms comply, USDT trading in the EU will shift to unlicensed venues, to self-custody, or to MiCA-authorized alternatives. If compliance is uneven, the opinion will show how much enforcement depends on national regulators. The January 8 date is the next marker. This is reporting, not investment advice.

Further reading

Frequently asked

What did ESMA announce?

On October 8, the European Securities and Markets Authority published an opinion addressed to national regulators. It says authorized crypto-asset service providers should not provide services that let EU customers buy, trade, swap, or otherwise increase their holdings of stablecoins that do not comply with the Markets in Crypto-Assets Regulation (MiCA), and that remaining customer holdings should be resolved as soon as possible and no later than three months after publication.

Which stablecoins are affected?

The opinion does not name specific tokens. CoinDesk identifies Tether's USDT, the largest stablecoin by market value, as the most prominent example, and says PayPal USD is also not authorized under MiCA. Whether any other token is affected depends on whether it has MiCA authorization.

Can EU users still sell or withdraw USDT?

Under the opinion, platforms may offer limited services that let customers sell, convert, withdraw, transfer, or safekeep tokens they already hold during the wind-down. New purchases, promotion, trading, and continued market availability are not allowed. Because platforms set their own timelines within the deadline, some users may face an earlier cutoff, so follow the instructions your platform provides.