Crypto: Coinbase converted your USDT to USDC without asking you, why and what to do?

If you had USDT on Coinbase in Europe and you didn't move it in time, check your balance: you don't have any left. On Friday, October 30, the platform automatically converted everything that remained into USDC, at the price at the time, without asking you anything. And not just the USDT: fourteen tokens were affected, including one that represents gold.

This isn't a hack or a whim on Coinbase's part. It's the European crypto regulation that has just started biting for real.

On October 30, the tokens were exchanged all at once, at the market price

What is a stablecoin again?

A stablecoin is a crypto that doesn't move. Well, that isn't supposed to move: each token is worth one dollar, because the company that issues it keeps, in theory, one dollar in reserve for every token in circulation. We use it as a waiting room, to get out of bitcoin without going back through our bank, or to send money to the other side of the world in a few minutes.

The two biggest ones are called USDT, issued by the company Tether, and USDC, issued by Circle. On paper, they're the same thing. Except that since July 1, in Europe, they're not the same thing at all.

Why Coinbase did this

MiCA is the European regulation that has governed crypto since the end of 2024. One of its rules is simple: a stablecoin can only be offered to the public in Europe if the company that issues it has obtained European approval, an official authorization issued by a regulator. Circle applied for it and obtained it, in France. Tether did not. The grace period for issuers ended on July 1, 2026, without an extension.

On October 8, ESMA, the European financial markets watchdog, hammered the point home: licensed platforms must stop every service linked to these non-compliant tokens, and liquidate whatever remains by early January at the latest. Coinbase, which serves its European customers from Luxembourg with approval from the Luxembourg regulator, chose to go faster than the deadline. Buying, selling and exchanging were already blocked, and customers had until October 30 to withdraw their tokens. What remained was converted all at once.

The complete list of the fourteen: USDT, PAX, PYUSD, GUSD, GYEN, DAI, BUST, UST, RAI, PAXG, MUSD, USD1, USDS and TGBP. So that also includes PayPal's PYUSD and DAI, which many people thought were untouchable.

The case of gold, and it's a tasty one

PAXG is a token that represents one ounce of gold, about 31 grams, kept in a vault in London. You can buy a piece of it, sell it at 3 in the morning, and whenever you want, check the number of the bar behind it. Uncle Scrooge's dream, smartphone version.

The problem is that MiCA puts this kind of token in another family, the one for tokens backed by a basket or a commodity. And according to CryptoTicker, no issuer has yet received approval in this family since it came into existence, in June 2024. Paxos, which issues PAXG, does have a European license, in Finland, but for another token, a dollar stablecoin. Not for gold.

Coinbase converts to USDC when that is appropriate, otherwise into another asset, and does not specify which one for gold

Result: whoever had put a bit of money into digital gold on Coinbase woke up with something else. Coinbase says it converts to USDC "when that is appropriate", otherwise into another asset or currency. For gold, I couldn't find anywhere what was chosen. Your history will tell you.

What this does for you, all the same

Okay, let's be honest for two minutes. Having your tokens changed during the night is unpleasant. But look at what you got instead. USDC is issued by a company approved in Europe, which has to keep its reserves safe, and above all pay you back one dollar for one dollar if you ask. This right to reimbursement is written into MiCA. With a token that isn't approved, you only have the issuer's promise.

It's a bit like the roadworthiness test. Nobody likes it, everyone complains while paying, but we're happy the car opposite us went through it.

What I would do in your place

First, open your Coinbase history and look for the conversion line from October 30. Note the date, the quantity and the price. Coinbase says so itself: converting one crypto into another can have tax consequences, and depending on the country it may count as a sale. With those three figures at hand, your tax return or your accountant won't have to play guessing games.

Next, and this is the trap: don't send any more USDT to Coinbase. Deposits that arrived after October 30 are neither credited nor converted. Coinbase mentions a recovery procedure for certain assets, but without any guarantee. Needless to say, you're throwing a bottle into the sea.

And if you have USDT on another European platform, it's the same story a few weeks late. I explained to you a little over three weeks ago that European platforms had until January 8 to clean things up. Each one will choose its date and its method, so it's up to you to keep an eye on the emails we never read.

January 8, 2027, the deadline set by ESMA for licensed European platforms

One last thing: nothing prevents you from keeping USDT or PAXG. MiCA targets issuers and platforms, not you. You can still keep them in your own wallet, an app or a little key that keeps your cryptos at home rather than with a platform. But then you're leaving the European safety net, and if you lose your key, nobody will send it back to you in the mail.

Keeping your cryptos yourself is allowed, but you also become your own banker

My opinion

As far as I'm concerned, the rule is good. A token that claims to be worth one dollar must be able to prove it, period. What bothers me is the way it's done: customers who didn't open the right email wake up with something other than what they bought, and one more line on their tax return. Coinbase played by the rules, but it could have warned people a little more loudly than with an article in its help center.

And to Tether, which remains the biggest stablecoin in the world: the European approval application has been online for two years, you know!

Sources

• Coinbase, help center: stablecoins that don't comply with MiCA and the October 30, 2026 conversion
• Crypto Briefing: Coinbase converts 14 assets for its European customers
• CryptoTicker, October 28, 2026: PAXG, digital gold and MiCA's blind spot
• CoinDesk, October 8, 2026: ESMA gives platforms three months to remove unlicensed stablecoins

Article written with the help of Claude Code, proofread and corrected by me.