US Treasury wants exchanges to vouch for foreign stablecoin issuers

• The US Treasury has proposed rules under the GENIUS Act that would let American platforms keep listing some foreign-issued payment stablecoins, but only if they can defend why they trusted the issuer.
• Diligence would have to go beyond checking a public prohibition list. Reliance would be barred where a platform knows, has reason to know or should know that an issuer’s promise is false.
• This is a proposal at the comment stage. No rule is in force, no token has been delisted, and it does not apply to UK platforms.

Stablecoins are the plumbing most crypto traders use without thinking about it, and the United States has spent the past year writing the first real rulebook for them. A Treasury proposal now doing the rounds would push a large part of the enforcement work onto the exchanges themselves.

What we can and can’t verify here

We are working from CryptoSlate’s write-up of the proposal. We have not read the Treasury text itself, and we could not locate the primary rulemaking document at the time of writing, so the specific wording quoted below is as reported by CryptoSlate rather than something we have checked against the source. That is worth saying plainly, because in a rulemaking story the exact verbs matter enormously.

What follows, then, separates two things: what the proposal is reported to say, and what the GENIUS Act framework already is. The second part is on firmer ground.

The GENIUS Act, from nothing

A stablecoin is a crypto token designed to hold a fixed value, almost always one US dollar. It does that by having something behind it. The issuer takes your dollar, holds it in cash or short-term government debt, and gives you a token that it promises to swap back for a dollar whenever you ask. The token is useful because it moves at crypto speed while behaving, most of the time, like money.

The GENIUS Act is the US federal law that puts that arrangement under supervision. Its central invention is a category: the permitted payment stablecoin. To be permitted, an issuer has to be approved, has to hold reserves of a defined quality, and has to be capable of doing what a supervised financial institution does when the state comes knocking. That last part is the one this proposal is about.

A dollar in a bank account can be frozen. A court order arrives, the bank complies, the money stops moving. Legislators wanted the same lever over dollar-denominated tokens, and the technical answer is that many stablecoin issuers can freeze or burn tokens held at specific addresses. So the law leans on that capability, and the question becomes what happens when the issuer sits outside American jurisdiction entirely.

Why foreign issuers are treated differently

A US-regulated issuer is directly reachable. Its charter, its banking relationships and its executives are all inside the system, so an order lands on someone who has to answer.

A foreign issuer is not reachable in the same way. It may be perfectly willing to comply, it may have the technical ability, and it may be supervised competently at home. But the American authorities cannot assume any of that, and cannot compel it directly. The GENIUS framework’s response, on the reporting available, is not to ban foreign tokens outright. It is to make the American businesses that touch them responsible for having checked.

What the proposed duty actually asks for

As reported, a US platform that lists, sells, custodies or otherwise makes a foreign payment stablecoin available could rely on the issuer’s own representation that it has both the technology and the intent to comply with lawful orders, including valid orders to freeze or seize tokens where applicable, plus any reciprocal arrangements between regulators. But that reliance is only permitted after reasonable due diligence.

Treasury is reported to say that diligence should, at a minimum, confirm the issuer is not subject to a public GENIUS Act prohibition on secondary trading. Checking a list is the floor, not the ceiling. Platforms would also have to consider all reasonably available information about the issuer, and reliance would be barred where the platform knows, has reason to know, or should know that the representation is false or that the issuer cannot or will not comply.

“Should know” is where the weight sits. It means a platform cannot protect itself by not looking. If the information was there to be found, the defence of having taken the issuer’s word for it fails.

The proposal, as reported, does not identify which issuers would qualify. That absence is not a small gap, and it is the thing to watch for in the final version.

What it would mean in practice

Think about what a compliance team at a US venue would now need on file for each foreign stablecoin it lists: a documented assessment of the issuer’s reserve arrangements and redemption record, evidence that the freeze capability exists rather than being asserted, a view on the issuer’s home supervisor, and a record of anything publicly known that cuts against the issuer’s own account of itself. Refreshed, presumably, rather than done once.

For the largest and most transparent issuers that is a cost, not an obstacle. For smaller foreign issuers, or ones with thin disclosure, the calculation for the exchange changes. The trading revenue from a mid-sized stablecoin pair may simply not justify carrying a file that a regulator could later say was inadequate. That is how a due diligence rule becomes a delisting decision without anyone writing the word “ban”.

The interested parties line up predictably. Foreign issuers want the qualifying route kept broad and workable. US issuers benefit if it is narrow, because their competitors get harder to list. Exchanges want certainty above all, since ambiguity is what makes the liability expensive. Treasury wants a lever that works. None of those positions is illegitimate, and all of them will be in the comment file.

Where this leaves a UK reader

Three regimes are running in parallel and they are not the same thing.

The GENIUS Act is American law binding American issuers and American service providers. The EU’s MiCA regime already governs e-money tokens across the bloc and has its own reserve, issuance and disclosure requirements, which is why some tokens were pulled from EU venues and not from UK or US ones. In the UK, the FCA has been consulting on its own approach to stablecoin issuance and custody under the wider cryptoasset regime, on a separate timetable and with separate definitions.

The practical consequence: a stablecoin that becomes awkward to list in the US is not automatically unavailable to you. A UK-registered platform answers to UK rules. But if your account sits with a global exchange that runs one product decision worldwide, the US position can reach you anyway, and that is worth knowing before you assume British rules are the only ones that apply to your balance. If you are weighing where you hold things, our guide to where to buy covers how UK access differs by venue, and the self-custody guide covers what changes when you hold tokens yourself.

What to watch

The final rule, and specifically whether it names qualifying jurisdictions or issuers. A list is manageable. A standard alone, with “should know” attached, pushes every judgement onto the platform and makes cautious delisting the safe commercial choice.

Then watch the comment letters, which are public in US rulemaking and usually more candid than press statements. And watch for the first venue that quietly narrows its stablecoin listings while citing nothing in particular. That, rather than any announcement, is what the rule taking effect will actually look like. More on regulation as it develops in our policy coverage.