
Newly disclosed court filings have sparked discussion around a potential Tether ban after revealing that Circle blocked Malta-based crypto investment fund Heka from its platform in late 2023. Circle stated that it discovered suspicious patterns of Heka redeeming USDC and converting the proceeds into Tether’s USDT during the SVB crisis when USDC temporarily fell below the one-dollar peg.
According to filings, it is noted that Circle discovered unusual amounts of USDC redemptions following the bankruptcy of Silicon Valley Bank when USDC was trading at a price lower than the pegged one-dollar price. The plaintiff claims that Heka made significant redemptions of USDC and converted the funds into Tether’s USDT, thereby allowing USDT to capture market share in the face of uncertainties about USDC.
Stablecoins are the mainstay infrastructure that supports cryptocurrency trading, decentralized finance, and international payments. Disruptions of major issuers can have ripple effects through markets by affecting liquidity, reducing investor confidence, and impacting the entire digital asset space.

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Tether Ban Debate Intensifies After Circle Defends Platform Restrictions
According to court documents, the Tether fund Heka had already invested $800 million before the disputed trading activities. Circle claimed that the fund had engaged in more than just arbitrage, and the trading pattern had been conducted to exploit market volatility. The company believed that the Tether ban was needed in order to secure the stability of USDC and prevent manipulation.
In response to the restriction, Heka initiated arbitration proceedings claiming that restricting access to Circle’s platform hindered its investment strategy and caused losses amounting to nearly $49 million. However, the arbitrator decided in favor of Circle, stating that Heka acted in bad faith. As a result, the Tether ban has been justified by the court, and Heka had to cover the legal expenses of Circle.
Stablecoin Competition Faces Greater Regulatory Focus
The newly released filings provide rare insight into the rivalry between Circle and Tether, the two largest stablecoin issuers by market presence. While USDT remains the dominant stablecoin globally, USDC has positioned itself as a compliance-focused alternative with strong institutional adoption. The tether ban reveals how competition between stablecoin issuers goes beyond pricing issues and includes platform restrictions and liquidity management.
Experts point out that the dispute demonstrates an increasing importance of surveillance and compliance in the stablecoin markets due to heightened regulatory scrutiny in the aftermath of the 2023 banking crisis. Though the filings don’t mention any participation of Tether in the disputed trading actions, they show increasing regulatory focus on market behavior. In the future, exchanges, institutional investors, and stablecoin issuers will have to improve their monitoring mechanisms due to changing regulatory standards around the world.
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