In this lesson
- find out why Tether (USDT) has been surrounded by doubts for years
- learn what regulators found in 2021 and what the company paid
- learn to read a stablecoin attestation and tell it apart from an audit
What is the Tether controversy? Tether issues USDT, the largest stablecoin – about 185 billion dollars in circulation in mid-2026. For years it said every token was fully backed by US dollars. In 2021 the New York Attorney General called that claim false and Tether paid 18.5 million dollars, and the US CFTC fined it another 41 million – both settlements without Tether admitting wrongdoing. As of October 2026, USDT still holds its 1-dollar peg, it has published a first full audit, and the debate has moved from "is there anything behind it?" to "what exactly is behind it?".
Imagine a coat check that hands out a ticket for every coat. Thousands of people hold tickets, nobody is allowed into the back room, and the attendant keeps saying: "Trust me, the coats are all there." For several years, that was roughly the Tether story.
What is Tether (USDT)?#
Tether launched in 2014 with a simple promise: send 1 dollar, get 1 USDT, and you can always swap it back. USDT became the "cash" of the crypto world – most trading pairs on big exchanges are quoted in it. It is run by Tether Limited, a company closely linked to the exchange Bitfinex (they shared owners and managers).
The whole value of a stablecoin rests on one question: is there really 1 dollar behind each token? If not, everybody holding USDT carries a hidden risk – and when too many want out at once, it ends in a run.
Timeline#
| Date | What happened |
|---|---|
| 2014 | Tether launches; the website says each USDT is backed one to one by US dollars |
| 2017–2018 | Tether loses reliable bank access; doubts about the reserves grow |
| 2018 | Bitfinex loses access to about $850 million held by the payment processor Crypto Capital |
| April 2019 | The New York Attorney General (NYAG) sues, saying Tether's reserves were used to cover the hole |
| February 2021 | Settlement with the NYAG: $18.5 million, no admission of wrongdoing, quarterly reserve reports |
| October 2021 | The CFTC fines Tether $41 million over its reserve statements (Bitfinex another $1.5 million) |
| 2024–2025 | Big EU exchanges stop offering USDT to EU users because it has no MiCA authorisation |
| January 2026 | Tether launches USAT, a separate US stablecoin designed for the US GENIUS Act |
| August 2026 | Tether publishes its first full audit by a Big Four firm (KPMG, for the year 2025) |
What did the regulators find?#
New York (2021). According to the NYAG, from mid-2017 Tether did not hold enough reserves at all times. When Bitfinex could not get its roughly 850 million dollars back from Crypto Capital, hundreds of millions of dollars moved from Tether's reserves to Bitfinex. The Attorney General's office said Tether's claim of being fully backed by dollars "at all times" was "a lie". Tether and Bitfinex settled for 18.5 million dollars without admitting wrongdoing, stopped serving New Yorkers and had to publish reports on their reserves for two years. The companies said the investigation never found that Tether issued tokens without backing.
The CFTC (2021). The US derivatives regulator found that in a 26-month sample period between 2016 and 2018, Tether held enough fiat reserves to back all USDT on only 27.6 % of the days. Part of the "reserves" were other assets, and reserve money was mixed with operating money. Tether settled and paid 41 million dollars.
In other words: nobody proved that USDT was worthless – but the regulators found that the "1 token = 1 dollar in the bank" promise was not true for long stretches.
The "printer go brrr" meme#
In crypto circles, every big new batch of USDT triggers the meme of a money printer going "brrr". Critics have long claimed that freshly minted tethers pumped the price of bitcoin; a widely cited 2018 academic study argued something along those lines. Tether has always rejected it, saying new USDT is issued only when customers pay in. The meme survives, while the question was never settled in court – a good reminder to separate jokes, theories and findings.
Attestation vs. audit: how to read the numbers#
Since the settlements, Tether publishes a quarterly attestation prepared by the accounting firm BDO. That is not the same as an audit:
| Attestation | Audit |
|---|---|
| A snapshot on one day (e.g. 30 June) | Covers a whole year of transactions |
| Checks that the assets listed exist on that day | Also checks controls, valuations and how money moved |
| Can be "window-dressed" for the reporting date | Much harder to dress up |
In August 2026 Tether announced that KPMG had audited its financial statements for 2025 and issued a clean (unqualified) opinion, with reserves exceeding liabilities by about 6.8 billion dollars. Critics noted the full report was not immediately published. Still, it is a big step from the "trust me" era.
What is behind USDT today? According to the Q2 2026 attestation, assets of about 188 billion dollars faced liabilities of about 184 billion. Most of it sits in short-term US Treasury bills and repo agreements, plus roughly 146 tonnes of gold (about 10 % of assets), almost 99,000 bitcoins (about 3 %) and secured loans (about 7 %). Notice the trap: gold and bitcoin go up and down. In Q2 2026 their prices fell and the cushion of excess reserves shrank by half, from about 8.2 to 4.1 billion dollars.
When you read any attestation, ask three questions:
- What date is it for, and who signed it?
- Are the assets cash-like (Treasury bills, bank deposits) or risky (loans, gold, crypto)?
- How big is the cushion compared with the risky part?
Regulation: MiCA in Europe, GENIUS in the US#
- EU: Under MiCA, a stablecoin offered to the public needs an authorised issuer. Tether did not apply for USDT, so between December 2024 and March 2025 Coinbase, Crypto.com, Kraken and Binance stopped offering USDT to users in the EU. Holding USDT in your own wallet is not illegal.
- USA: The GENIUS Act of July 2025 created federal rules for payment stablecoins. Instead of changing USDT, Tether launched a separate token, USAT, issued through the US bank Anchorage Digital (January 2026).
Warning signs you could have seen#
- "Fully backed" without proof. For years there was no independent report, only a promise.
- Lost bank accounts. A dollar-backed company that keeps losing banks has trouble holding dollars.
- Mixing with a related exchange. When the issuer and an exchange share owners, money can quietly flow between them.
- Changed small print. In 2019 Tether's website changed the wording of what backed the tokens to include loans to affiliated companies.
A stablecoin is only as stable as its reserves
A stablecoin is a promise from a company. If the reserves are short, risky or frozen, the token can lose its peg and you may not get a full dollar back. Do not keep large savings in a single stablecoin, check where the reserves are and who checks them, and remember that a licensed issuer in your region gives you more legal protection than one that is not.
Common myths#
- "Tether was proven to be a fraud." No. Regulators found false or misleading statements about its reserves and Tether settled without admitting wrongdoing. No court ruled USDT a fraud.
- "An attestation is an audit." It is a one-day snapshot. An audit is far more thorough.
- "USDT is banned in the EU." It is not authorised under MiCA, so licensed EU platforms do not offer it. Owning it is not a crime.
Summary
- USDT is the largest stablecoin; for years its "fully backed by dollars" claim was not independently verified.
- In 2021 Tether paid $18.5M to the NYAG and $41M to the CFTC, without admitting wrongdoing.
- Today its reserves are mostly US Treasuries, plus gold, bitcoin and loans; a first full audit (KPMG, 2025) followed in 2026.
- Read attestations critically: date, quality of assets, size of the cushion.
Sources#
- New York Attorney General – settlement with Bitfinex and Tether (2021) (opens in a new tab)
- CFTC – Tether and Bitfinex to pay $42.5 million (2021) (opens in a new tab)
- Tether – transparency and attestation reports (opens in a new tab)
- CoinDesk – Tether's Q2 2026 reserves and shrinking buffer (opens in a new tab)
- CoinDesk – Tether completes a Big Four audit by KPMG (opens in a new tab)