Tether USDT Freeze Lawsuit Filed Over $42.4M

Two Thai businessmen filed a Tether USDT freeze lawsuit on Aug. 31, 2026, in the U.S. District Court for the Southern District of New York. Nutthawat Rukthammachalern and Natthawat Kasamvilas say Tether froze 42,417,785.62 USDT, worth about $42.4 million, without a court order. They claim Tether acted only on an informal request from a Homeland Security Investigations agent. Tether had not filed a public response as of Sept. 2.

What the Lawsuit Against Tether Claims

The complaint says Tether blacklisted ten Ethereum addresses on Oct. 30, 2025. Those addresses held exactly 42,417,785.62 USDT, according to the filing. No warrant, subpoena or court order backed the freeze at that time, the plaintiffs argue. Tether moved first and asked questions later, the lawsuit suggests.

Kasamvilas discovered the freeze when he tried to send a transaction. He contacted Tether for an explanation. The company allegedly pointed him to an HSI agent’s email address instead of stating any legal basis. That is an odd way to answer a customer, and it now sits at the center of the case.

This is not an unusual venue for a crypto dispute. Tether faces near constant scrutiny from U.S. courts and prosecutors, whether or not it holds a warrant in hand. The lawsuit does not accuse Tether of the underlying pig-butchering fraud. Instead, it accuses Tether of freezing first and sorting out the legal process later.

Inside the Tether USDT Freeze of $42.4 Million

Tether’s Ethereum smart contract includes a function called addBlackList. It stops tokens at flagged addresses from moving anywhere. A second function, destroyBlackFunds, lets Tether burn blacklisted USDT completely. The complaint says Tether used both tools against the plaintiffs’ wallets.

In plain terms, addBlackList works like a lock on a wallet address. Coins already inside cannot move, no matter who claims to own them. destroyBlackFunds goes further. It deletes the tokens outright. Both functions sit inside Tether’s own contract, and only Tether can pull the trigger.

The plaintiffs say they got the USDT through normal secondary-market deals. They never had a direct customer relationship with Tether. Holding the technical keys to a smart contract is not the same as owning legal rights to tokens inside it, they argue. That distinction sits at the heart of the entire dispute.

Does a Seizure Warrant Justify the October Freeze?

Can a later warrant validate an earlier freeze?

A seizure warrant issued months later cannot excuse an earlier, unauthorized freeze, the plaintiffs argue. On Feb. 19, 2026, a magistrate judge in the Eastern District of North Carolina signed seizure warrant 5:26-MJ-1267-JG. That order described a process where Tether would burn the USDT at the flagged addresses, mint new tokens, and send them to a government wallet.

The plaintiffs do not just dispute how investigators traced the funds. They question whether a private company can restrict tokens in someone else’s wallet, based only on an informal law-enforcement tip, before any judge signs off. They also argue the February warrant cannot cure Tether’s October decision after the fact. Burning property and minting replacement tokens before a final forfeiture judgment raises its own separate legal problem, the complaint states.

Tether’s Role in the $61 Million Pig-Butchering Case

Five days after the warrant, federal prosecutors announced the Tether $61 million pig-butchering scam seizure, seizing more than $61 million in USDT tied to so-called pig-butchering investment scams. Homeland Security Investigations reportedly opened the probe after receiving a victim’s tip. Investigators traced funds through several wallets used to hide their origin and their link to fake trading platforms.

The Justice Department thanked Tether for helping move the assets. In a Tether DOJ pig-butchering fraud assistance confirmation, the company separately confirmed its role in the broader operation. That confirmation covers the $61 million case as a whole. It does not resolve whether the plaintiffs’ specific $42.4 million had already reached the government wallet when they filed suit. Court records available so far suggest those tokens were still frozen, not yet transferred, at filing time.

Pig-butchering scams get their name from the way operators fatten up a victim with fake romance or investment chats before draining their money. Prosecutors say the wallets tied to this case fit that pattern, with funds moved through several addresses designed to hide where they really came from. That is the broader operation Tether says it helped unwind. It is a separate question from whether Tether had the right to freeze the plaintiffs’ specific tokens back in October.

What the Plaintiffs Want

The lawsuit brings several legal claims against Tether. It seeks both money and a court order.

The plaintiffs want the court to order Tether to lift the blacklist. They also want damages if the tokens get burned, plus any income Tether earned from reserves tied to the frozen USDT.

• Conversion
• Trespass to chattels
• Unjust enrichment
• Declaratory and injunctive relief

Tether’s Blacklist Power at Scale

This case touches a much bigger pattern. Data from the Tether $514 million USDT blacklist 370 addresses tracker shows the company blacklisted that sum in a single 30-day stretch during 2026. Of those addresses, 328 sat on Tron and 42 on Ethereum. Tether’s 2025 blacklist alone covered 4,163 Ethereum and Tron addresses.

That scale is why this lawsuit matters beyond two Thai businessmen and their frozen tokens. Every USDT holder relies on the same smart contract, with the same override switches built in. If a court decides Tether jumped the gun in October, the ruling could reshape how fast the company can freeze wallets on an informal tip in the future.

The next step is service of the complaint and Tether’s formal response. The court could also weigh an early request to stop Tether from burning or reissuing the tokens while the case moves forward. The plaintiffs separately filed an application in North Carolina on July 31 seeking return of the USDT. Neither court has ruled yet on ownership, forfeiture, or Tether’s liability. For now, the $42.4 million sits frozen, caught between two courts and one company’s blacklist button.

What This Means for USDT Holders

This case is bigger than one frozen wallet. Tether’s blacklist tool works fast and without much warning, and that is exactly the point of it, catching bad actors before they can move stolen funds. But speed cuts both ways. A tool built to freeze scammers can just as easily catch someone with a legitimate secondary-market claim, caught in the crossfire of an investigation they had nothing to do with.

If a judge sides with the plaintiffs, Tether may need a court order before freezing tokens next time, not just a phone call from an agent. That would slow down fraud response, but it would also protect innocent holders down the line. If the judge sides with Tether, the message is blunt: cooperate first, litigate later, and hope you get your money back.

This article is for informational purposes only and does not constitute investment advice. Every investment and trading decision involves risk. Readers should conduct their own research before making any financial decisions.