Circle freezes Zama cUSDC via US court TRO and USDC blacklist

Published: 2026-06-01 07:22:13 |

Circle has frozen Zama’s confidential USDC smart contract (cUSDC) on Ethereum after a U.S. court TRO tied to an Overnight Finance dispute. On 30 May 2026 at 01:08 UTC, Circle applied a USDC blacklist to the cUSDC wrapper and froze 12,606,386 USDC across depositors. An on-chain investigator, ZachXBT, linked the frozen pool to a single treasury-linked deposit made on 11 May. The TRO, issued on 29 May 2026 by Judge P. Casey Pitts in Newton AC/DC Fund LP v. Maxim Ermilov, alleges Ermilov moved $15.77M from Overnight Finance’s treasury ahead of an OVN holder vote to liquidate. Plaintiffs claim a wallet tied to those funds deposited about 12.4M USDC into the Zama cUSDC contract—over 99% of the amount later frozen. Ermilov denies the allegations. Zama says it received no advance notice and has paused cUSDC, cUSDT and cWETH wrappers to limit spillover. The company is seeking an order to isolate the disputed deposit, with a hearing scheduled for 1 June. For traders, this is a real-world USDC settlement risk: a Circle USDC blacklist can temporarily lock otherwise non-sactioned users’ pooled funds, and the next court ruling could quickly change access and sentiment around confidential stablecoin wrappers.

Bearish

A Circle USDC blacklist driven by a court TRO creates near-term uncertainty for pooled “confidential” stablecoin wrappers. Even if the targeted deposit represents a small portion of users’ economic exposure, the wrapper-level freeze can block redemptions and trigger forced risk-off behavior in USDC-linked products. In the short term, traders may price higher counterparty/legal risk into cUSDC/cUSDT/cWETH usage and reduce exposure until the 1 June hearing clarifies whether funds tied to the disputed deposit will be isolated or partially released. Longer term, the precedent can weigh on sentiment toward privacy-style stablecoin mechanisms if users expect sanctions/blacklist spillover despite the absence of an on-chain sanctions flag. Net effect on USDC itself is likely negative sentiment rather than immediate fundamentals-driven demand shock, but it can still pressure price via trust and liquidity perceptions.