Circle Freezes Millions in Stablecoins Linked to Zama Protocol

Circle, a leading stablecoin issuer, has taken unprecedented action by freezing $12.6 million in USDC linked to a confidential smart contract associated with the Zama protocol. The move has sent shockwaves through the DeFi community, raising concerns about the power of centralized issuers to intervene in user funds.

The freeze is part of an ongoing debate over the balance between anti-fraud enforcement and user rights in DeFi protocols. Critics argue that Circle's actions are inconsistent and lack transparency, undermining trust in stablecoins and DeFi projects that rely on interoperability and user-owned assets.

Observers point to a history of controversy surrounding Circle's fund freezes, including the Drift Protocol breach in April 2026, where about $232 million worth of user funds were reportedly not frozen in a timely manner. This incident contributed to a class-action lawsuit alleging that Circle failed to intervene to halt the flow of ill-gotten funds via its Cross-Chain Transfer Protocol (CCTP).