A single coordinated action has put $213 million of Gurhan Kiziloz’s USDT holdings beyond his reach. Tether Operations Ltd. has frozen the funds across 48 digital wallets tied to the iGaming founder, executing the freeze in support of Brazilian authorities pursuing an alleged gambling tax dispute and a parallel line of inquiry into initial coin offerings.
The freeze is one of the larger single-target enforcement actions in the stablecoin’s history. It relates to activity conducted between 2021 and 2024, a period that preceded both Brazil’s formal iGaming licensing regime and the country’s clearer regulatory posture on token issuance. No criminal charges have been filed. The matter is proceeding through Brazil’s civil courts.
Kiziloz did not respond to requests for comment.
At the centre of the action is a question with consequences well beyond the immediate parties. Brazilian authorities are seeking to apply rules enacted in 2024 to conduct that took place before those rules existed, including alleged gambling tax obligations and alleged registration requirements for token sales. Kiziloz’s legal team is expected to argue that the absence of any binding regime during the relevant period places the action in conflict with constitutional protections against the retrospective imposition of fiscal and regulatory duties.
The execution of a 48-wallet freeze in support of a gambling tax dispute is not a routine compliance action. Each account had to be individually identified, mapped, and tied back to the disputed tax window before Tether could move, a process that demands granular on-chain analysis and sustained cross-border cooperation between Brazilian tax authorities and the issuer. The scale of the operation suggests Brazilian authorities have been assembling the tax case for some time. It also confirms that Tether’s compliance infrastructure has reached a depth at which retrospective fiscal claims can be executed at speed.
Tether has now frozen more than $5.1 billion in USDT since inception, according to on-chain analysis, including over $500 million in the past 30 days alone. With circulating supply approaching $190 billion and USDT functioning as the primary liquidity instrument across the cryptocurrency market, the firm’s freeze button has become one of the most consequential enforcement tools in digital finance. When Tether acts, liquidity disappears in minutes, not after weeks of court motions and bank wire reversals.
The civil courts will now determine the substance of Brazil’s claim. The outcome is expected to set a reference point for other operators and token issuers active in the country during the same pre-regulation window.
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