ESMA stablecoin proposal could cut off custody and transfer services

Europe's main securities watchdog is pushing for much tougher stablecoin rules. The European Securities and Markets Authority (ESMA) wants the European Commission to ban all regulated crypto-asset services-including custody and transfer-for stablecoins that don't meet the EU's Markets in Crypto-Assets (MiCA) requirements. If this goes through, holders of non-compliant tokens could lose access to licensed platforms, even if they've stopped trading. This would be a big shift from the current system, where users can still keep or move their balances after trading pairs are delisted.

From trading bans to full service cutoff

ESMA's earlier plan, set for January 2025, would have stopped trading and public offers of non-compliant stablecoins. But users could still use regulated custodians to store or withdraw their tokens. That mattered: losing a trading pair didn't mean losing your coins. Binance, for example, said it would remove some stablecoin trading pairs for European Economic Area users by March 31, 2025, but would keep deposits, withdrawals, conversions, and custody open, as reported earlier.

Now, ESMA's latest proposal, filed in September 2026, would scrap that exception. Instead of looking at each service on its own, ESMA wants a blanket ban on all regulated services for non-compliant stablecoins. Even holders who aren't trading could be forced to pull their assets from licensed custodians. There's no promise of a smooth exit or conversion. The proposal doesn't set a start date, mention any withdrawal exceptions, or explain how providers should return client assets if services are suddenly cut off.

Regulatory mechanism and legal uncertainty

ESMA's push is based on MiCA's definitions. MiCA covers custody (holding or controlling client assets or private keys) and transfer (moving assets for clients). Getting licensed as a crypto-asset service provider doesn't let you hold or move a non-compliant stablecoin just because the client isn't trading. The stablecoin itself must meet EU rules.

Right now, custodians have to return client assets as soon as possible, and keep them separate from their own funds. If a client asks for a withdrawal, the provider must return the same type of asset, unless the client wants a conversion and the provider is allowed to do that. But ESMA's proposal doesn't explain how a full ban would work with these duties, especially if transfer services are also blocked. Lawmakers would need to decide if clients must withdraw to self-custody, convert to something else, or face other limits.

This is a big deal for stablecoin issuers and users. If the proposal becomes law, only compliant stablecoins would keep access to regulated custody and transfer in the EU. Non-compliant tokens could be locked out of the regulated system, even for people who already hold them. Compliant issuers could get a distribution edge, but the proposal doesn't force conversions or set a global standard. People could still own non-compliant stablecoins, but they couldn't use licensed providers to store or move them.

Research by Nicola Borri and Kirill Shakhnov looked at USDT and USDC trading on 14 major exchanges from January 2024 to December 2025. After EU-facing platforms delisted some stablecoins, USDC's share of trading rose by about six percentage points on regulated-facing exchanges compared to global venues. But the overall USDC to USDT trading volume ratio stayed almost flat. This suggests that trading bans on one group of platforms don't automatically shift global demand or custodial balances. The legal documents and research don't say how many users or assets would be hit by a future custody ban.

Policy status and next steps

ESMA's proposal is a policy recommendation, not law. The European Commission's review ended on September 30, 2026, and could lead to a legislative proposal. The current draft doesn't say how existing balances would be handled, how providers would wind down services, or what exceptions might apply. Until the law is set, regulated platforms and stablecoin holders face ongoing uncertainty about the future of custody and transfer for non-compliant tokens in the EU.

For U.S. readers, the proposed EU rules show how global stablecoin regulation is splitting. The U.S. still has no federal stablecoin law, while Europe is moving toward stricter enforcement and service bans for non-compliant tokens. The outcome could shape how exchanges, custodians, and users handle stablecoin risk and regulation across borders.

Stablecoin custody is a key but often misunderstood part of crypto. Custodial services let users store assets with a regulated provider, who controls the private keys and must return the assets on demand. This can lower some risks but adds counterparty and regulatory risk, especially when rules change or assets are delisted. Self-custody, where users hold their own keys, avoids third-party risk but puts more pressure on users to keep their assets safe. As rules tighten, users and providers have to weigh convenience, compliance, and control.