On-chain investigator ZachXBT revealed that stablecoin issuer Circle officially added privacy protocol Zama’s Confidential USDC (cUSDC) contract to its central blacklist. The localized intervention instantly froze 12,606,386.10 USDC, completely locking the underlying ERC-1967 proxy architecture. The sweeping freeze highlights a growing friction point for decentralized finance (DeFi), demonstrating how private civil litigation can mechanically incapacitate non-custodial smart contracts, leaving innocent third-party depositors caught in the crossfire as collateral damage.
A Delaware Court Injunction Targets an Alleged Overnight Finance Treasury Move
The backend trigger for Circle’s abrupt blacklisting stems from an escalating corporate and legal battle involving the decentralized finance protocol Overnight Finance. According to blockchain data, an address tied to the controversial dispute deposited roughly 12.4 million USDC directly into Zama’s cUSDC wrapper on May 11. At the time of the transaction, the fund transfer cleared standard Know-Your-Transaction (KYT) monitoring filters without triggering compliance alerts. However, because that single deposit accounted for more than 99% of the total liquidity pool inside the privacy wrapper, the contract became a high-value target for plaintiffs tracking the capital.
The underlying lawsuit was initiated by Patagon Management, a Delaware-based investment firm founded by Diogenes Casares. Known within the Web3 community for aggressive strategies targeting decentralized autonomous organizations (DAOs), Patagon filed a civil complaint against Overnight Finance founder Maxim Ermilov following community accusations of a treasury rug pull. Armed with an emergency restraining order issued by a United States court, the plaintiffs successfully petitioned Circle to freeze the assets. ZachXBT noted that the legal maneuver likely misrepresented the exact nature of the destination contract, inducing Circle to blacklist Zama’s entire pooled proxy wrapper rather than isolating the individual depositor’s wallet.
The Indiscriminate Reality of Centralized Stablecoin Blacklists
The sweeping intervention highlights a fundamental composability risk baked directly into the smart contract infrastructure of fiat-backed stablecoins. While Circle’s native blacklist function works cleanly when freezing isolated, externally owned accounts (EOAs), it acts as an indiscriminate tool when applied to pooled DeFi wrappers where multi-user funds are cryptographically commingled. By blacklisting Zama’s proxy code, Circle programmatically blocked every single token inside the address, preventing unaffected users from unwrapping or moving their private cUSDC balances.
The incident revives intense industry debates regarding the operational overreach of centralized asset issuers in private civil disputes. Critics point out that Circle chose to move with extreme speed on a corporate court injunction, contrasting sharply with previous major decentralized exchange exploits where hundreds of millions in stolen USDC flowed freely across cross-chain bridges without immediate issuer intervention.
In response to the operational freeze, Zama executive leadership moved quickly to protect adjacent ecosystems, temporarily pausing its native cUSDT and cWETH contracts as a precautionary measure while their legal teams intervened. Because Zama’s underlying Fully Homomorphic Encryption (FHE) protocol is engineered strictly to mask individual transaction amounts and account balances—rather than anonymizing user identities like older mixing protocols—the team is working directly with corporate compliance channels to isolate the disputed 12.4 million dollar capital block.
As the legal teams coordinate with Circle to peel back the blanket restriction and restore access for unaffected participants, the event serves as a blunt reminder to the Web3 sector that privacy infrastructure offers no true insulation from the sweeping authority of traditional commercial court orders.
