EU May Block Crypto Firms From Holding Non-Compliant Stablecoins

ESMA wants European crypto firms barred from providing regulated services involving stablecoins that fail MiCA, including custody and transfers. For a holder, that could mean a licensed provider could no longer keep or move a non-compliant token, even if the holder never plans to trade it again.

The proposal is not yet an operative EU rule. ESMA submitted its response to the European Commission on September 30, 2026. The Commission may later include legislative changes, but neither an application date nor a timetable for those changes has been confirmed.

What ESMA Wants Prohibited

ESMA recommends explicit rules preventing regulated crypto firms from offering services linked to stablecoins that do not comply with MiCA requirements. In its response, the regulator asks the Commission to prohibit every licensable crypto-asset service involving a stablecoin that fails MiCA's applicable requirements.

Custody and transfers are included in that service list. Under MiCA Article 3, custody covers safekeeping or controlling clients' crypto-assets or their means of access, including private keys. Transfers cover moving assets on a client's behalf between ledger addresses or accounts.

The available sources do not identify particular stablecoins or providers that ESMA considers non-compliant. USDT and USDC appear in a separate research paper, not in a confirmed enforcement list.

For holders, the practical difference between ownership and servicing is central. The proposal would not itself ban personal ownership, freeze orders or require conversion. But a licensed business might be unable to hold or move the token for a customer.

That distinction also prevents a simple workaround. A holder cannot avoid the proposed restriction by promising never to trade again, because custody is a separate service. MiCA Article 59 requires authorised providers to identify the services they are permitted to offer, but a provider licence does not by itself determine whether a particular stablecoin can be serviced.

A Shift From ESMA's Earlier Position

ESMA's proposal goes beyond its January 17, 2025 position. That statement distinguished between platforms offering non-compliant stablecoins to the public or admitting them to trading and firms merely holding or transferring them.

Under that earlier approach, platforms were expected to stop making the tokens available for trading. Other services had to cease where they constituted an offer to the public, but plain custody and transfers could remain available.

The new submission would close that gap. ESMA says the absence of a clear prohibition creates disparities between compliant and non-compliant issuers and allows regulatory arbitrage.

The history shows how much would change if the proposal were adopted. Binance's March 2025 approach, cited in the research, planned to remove trading pairs for nine tokens for users in the European Economic Area while retaining deposits, withdrawals, conversions and custody. Under ESMA's proposal, the latter services would also be at risk when they involve a non-compliant stablecoin.

What Happens to Existing Holdings

The research does not quantify the total EU stablecoin balances held through licensed custodians. That makes the likely scale of the restriction uncertain.

The legal position is clearer than its size. Under current MiCA Article 75, providers must return clients' crypto-assets or their means of access as soon as possible. Client assets must be segregated from the provider's own holdings.

A Commission answer through ESMA dated February 18, 2026 says returned assets must be the same type held when the customer requests withdrawal. Conversion into fiat or another crypto-asset is possible only at the customer's request, and the provider must be authorised for that additional service.

But Section 3.2 of ESMA's submission provides no withdrawal exception or wind-down mechanism. It also gives no implementation date. The exact wording of that section and the service list could not be checked against a readable copy of the full submission.

Compliance Could Split the Market

If adopted in its present form, compliant stablecoins could retain access to regulated custody and transfer channels that non-compliant tokens lose. Providers would then face a service boundary based on the status of the asset, not merely the provider's licence.

The wider MiCA package also includes stricter marketing rules, including promotions by influencers and third parties. ESMA also proposes clearer criteria for genuinely decentralised activities, a regulated service for firms giving users access to DeFi protocols, and binding opinions on token classification.

The stablecoin request is the immediate issue for holders. It asks the Commission to close a service gap that ESMA previously left open. Until the Commission acts, licensed firms are not barred from custody and transfers solely because a stablecoin fails MiCA. If the rules are adopted, access could disappear for a non-compliant token even when its holder makes no further trades.