Circle froze USDC balances held in 16 business hot wallets late Monday, with affected firms saying the action was tied to a U.S. civil case whose details remain sealed. The wallets were linked to exchanges, casinos, and forex platforms, and several businesses said the freeze disrupted day-to-day operations. The immediate problem was simple: funds were blocked, while the basis for the move was still unclear to outsiders.
On-chain investigator ZachXBT pushed the issue into public view in a post on X. He questioned why Circle had frozen 16 apparently unrelated wallets in a single civil case, arguing that even a basic review of on-chain activity made the action look unusually broad. In follow-up remarks cited by regional media, he said the addresses appeared to belong to exchanges, casinos, and forex platforms with no obvious connection to one another, yet all were blacklisted at once. He also said the freeze had already affected business operations.
USDC enforcement is back under scrutiny
The dispute arrives only weeks after ZachXBT criticized Circle in a separate case involving stolen USDC tied to SwapNet users. In that earlier episode, he accused the company of reacting too slowly to freeze more than $3 million in stolen funds and called Circle “a bad actor.” His criticism focused on what he described as slow or inconsistent enforcement from a centralized stablecoin issuer.
Data cited by CryptoNews adds context to that comparison. Tether has frozen about $1.6 billion in USDT across more than 2,500 addresses, while Circle has frozen roughly $110 million in USDC across fewer than 500 addresses. Those figures do not settle the argument on their own, but they do show that the two largest centralized dollar stablecoins have taken different paths in how often and how aggressively they use blacklist powers.
Blacklist controls are built into the contract
USDC’s smart contracts explicitly include the ability to blacklist addresses, and legal analysts as well as policy groups have pointed to that design for years. Supporters frame the controls as a tool against hacks and sanctions evasion. Critics see a different risk. If funds can be frozen under undisclosed civil actions and third parties cannot evaluate the standard behind the decision, a widely used settlement asset starts to look less neutral.
The timing matters. Institutional demand for tokenized dollars continues to grow, and platforms including Coinbase are expanding USDC’s role across crypto markets. That makes the latest freeze more than an isolated compliance event. It puts the trade-off back in front of builders and operators that rely on stablecoins for settlement, transfers, and on-chain liquidity: the convenience of a centralized dollar token comes with issuer-controlled gatekeeping.