Over $1.26 billion has been frozen. How can we prevent the risk of USDT freezing?
Understanding the causes of USDT freezing and implementing effective risk mitigation strategies are essential to protect your assets.
This article explores the main reasons behind USDT freezing incidents and offers practical advice on how to avoid such risks in your transactions and holdings.

The enforcement力度 in the stablecoin sector continues to intensify. As the issuer of USDT, Tether’s freezing operations across various addresses serve as a warning to the industry. By 2025, Tether has blacklisted a total of 4,163 unique addresses, freezing funds amounting to $1.26 billion, of which 55.6% ($0.986 billion) have been destroyed, and only 3.6% of blacklisted addresses were unblocked that year. Behind these figures lies a profound shift in the stablecoin regulatory landscape and presents an urgent risk response challenge for all USDT users.

1. 2025 Tether Freezing Data Analysis and Trend Review

We analyzed all AddedBlackList, RemovedBlackList, and DestroyedBlackFunds events related to USDT on Ethereum (ERC20) and Tron (TRC20) throughout 2025, arriving at the following conclusions.

1. More than half of frozen USDT was ultimately destroyed. Of the total $1.26 billion USDT frozen in 2025, Tether destroyed $698 million, accounting for 55.6% of the frozen funds. This indicates that most blacklisted funds are linked to concluded investigation cases; note that destroyed funds are usually re-minted to victims or law enforcement agencies.

2. The proportion of addresses removed from the blacklist is relatively low. In 2025, Tether blacklisted 4,163 unique addresses, but only 150 addresses (3.6%) were unblocked that year. Additionally, 231 address removal events occurred in 2025 involving addresses already blacklisted before that year. This suggests that once an address is added to Tether’s blacklist, the chance of successful removal afterward is very low.

From the 2025 freezing data, Tether’s blacklist operations show significant structural features and trend shifts, providing important reference points for market participants.

First, on-chain distribution varies significantly, with Tron becoming a high-risk area. Of the blacklisted addresses in 2025, 84.2% (3,506 addresses) are from the TRC20 (Tron) ecosystem, corresponding to $853 million frozen funds, reflecting a preference for low-cost, fast-confirmation chains for illegal activities; ERC20 (Ethereum) addresses account for only 15.8% (657 addresses), but the average frozen amount per address is $613,000, 2.5 times that of TRC20 addresses, highlighting the regulatory focus on large Ethereum on-chain funds.

2025 USDT Blacklist: Chain Distribution

Second, the temporal distribution shows concentrated peaks, with significant enforcement activity on weekends. July marked the peak of freezing activity, with 1,158 addresses frozen totaling $154 million, closely related to the enactment of the GENIUS Act and global anti-terrorism joint operations. Weekly distribution shows Saturdays as the most active day (22.4%), while Sundays drop to 2.1%, indicating that compliance monitoring needs to cover all time periods.

Monthly USDT freezing volume across chains in 2025

Finally, the long-term trend continues to tighten, with increasing freezing scales year by year. From 2023 to 2025, Tether has frozen over $3.29 billion involving 7,268 addresses. In early 2026, Tether froze $182 million across 5 TRON addresses in a single operation, signaling further regulatory tightening, with compliance shifting from “optional” to “mandatory.”

2. Why are addresses frozen?

Based on Tether’s official statements, disclosures, and industry practices, freezing actions mainly stem from three compliance scenarios, all centered around legal regulation and risk control.

First, responding to law enforcement requests, which is the primary trigger for address freezing. Tether has established deep cooperation with over 275 law enforcement agencies across 59 jurisdictions worldwide. It has high flexibility in freezing operations—no formal court order is required; verification requests from cooperating law enforcement agencies suffice to freeze related addresses. In emergencies, freezing can even be initiated based on informal email notifications. Over the past three years, Tether has handled more than 900 law enforcement freeze requests, with requests from US agencies accounting for over 50%, highlighting the concentrated enforcement demand in Europe and America.

Second, proactively implementing sanctions compliance and fulfilling international regulatory obligations. Since December 2023, Tether has officially launched an active sanctions screening mechanism. Addresses appearing on the OFAC (Office of Foreign Assets Control) Specially Designated Nationals (SDN) list are subject to automatic freezing, without external agency intervention. During initial implementation, Tether quickly froze 161 addresses on the list, demonstrating its strict adherence to international sanctions rules and compliance commitment.

Third, leveraging blockchain intelligence for proactive risk prevention. Through deep collaboration with T3 Financial Crime Joint Unit, Tether can preemptively identify and freeze addresses related to hacking, telecom scams, terrorist financing, and other illegal financial activities. Some freezes occur even before formal law enforcement requests, enabling front-loaded risk control. As of October 2025, this joint unit has successfully frozen over $300 million in illegal assets across 23 jurisdictions, effectively curbing illegal fund flows.

3. How to prevent? Building a full-process defense with BlockSec KYT

As freezing risks continue to escalate, passive responses are no longer sufficient. A proactive defense system must be built using professional KYT (Know Your Transaction) tools. BlockSec Phalcon Compliance offers an efficient solution with ease of use and precise risk control.

Pre-transaction precise screening to avoid source risks. Conducting comprehensive scans of counterpart addresses before transactions is the first line of defense. Phalcon Compliance supports instant, no-registration scans—simply input an address or transaction hash to get a risk score. It covers Tether blacklists, OFAC sanctions, known scam addresses, mixing service nodes, and over 4 million tagged addresses across 20+ blockchains, enabling multi-dimensional risk identification far beyond traditional contract status checks.

Real-time monitoring during transactions to track dynamic risks. Static screening cannot handle evolving address risks—over 33% of blacklisted addresses are frozen with zero balance, often due to risk exposure after transaction completion. Phalcon Compliance’s real-time monitoring tracks multi-hop fund flows, processing over 500 transactions per second, analyzing more than 200 risk signals. When an address’s risk level changes (e.g., linked to sanctions), alerts are pushed via multiple channels to help promptly block risky transactions.

Post-transaction compliance records to solidify response. The platform supports one-click generation of suspicious transaction reports (STR) compliant with FATF standards, tailored to over 27 jurisdictions. It fully documents screening, monitoring, and handling processes. These records are key evidence during regulatory audits or dispute resolutions, greatly improving issue resolution efficiency.

4. How to check if a wallet is frozen?

Compared to complex contract status queries via blockchain explorers, Phalcon Compliance provides a more convenient, comprehensive method to verify freezing status, balancing professionalism and ease of use.

Simple operation, results in seconds. Users do not need to learn contract function calls—just visit the Phalcon Compliance product page, input the wallet address, and quickly see whether it is blacklisted by Tether. The system also displays related risk factors (e.g., sanctions list hits, links to illicit addresses), providing not only “frozen or not” but also “reason for risk.”

Multi-chain coverage, no blind spots. Whether the wallet is TRC20 or ERC20, verification can be completed on the platform, avoiding missed queries due to chain differences. The platform’s millisecond response speed supports rapid decision-making in urgent scenarios. Batch query functions also meet enterprise-level compliance needs for large transactions.

5. What to do if frozen?

If a wallet is mistakenly blacklisted, it’s crucial to act quickly before funds are destroyed, and to maximize the chances of unfreezing through proper documentation.

First, confirm freeze status and reasons. Use Phalcon Compliance to verify the freeze, review transaction records, and clarify whether the address is linked to illicit activity or if the source of funds is legitimate. Avoid blind appeals based on unclear reasons. Remember, freezing (addBlackList) is temporary, while destruction (destroyBlackFunds) is permanent; appeals should be made before destruction.

Second, initiate multi-channel appeals. Prioritize submitting requests through official Tether channels—visit Tether’s official contact page (https://cs.tether.to)—and provide details such as the frozen address, complete transaction records, and proof of legitimate funds. If involved in law enforcement investigations, coordinate with the relevant agencies to request unfreezing; this was the main path for 150 successful unfreezing cases in 2025. When necessary, engage lawyers experienced in crypto asset confiscation to pursue legal remedies.

Third, leverage compliance records to strengthen appeals. Submit screening reports and transaction monitoring logs generated by Phalcon Compliance to demonstrate due diligence. This can significantly increase the likelihood of unfreezing in case of mistaken freeze. Beware of scams claiming to “crack contracts for unfreezing”—these are fraudulent. Blacklist adjustments are only made by Tether’s multi-signature governance team.

With the implementation of the GENIUS Act, stablecoin issuers are increasingly regulated as “financial institutions.” The comprehensive compliance deadline before mid-2028 is clear, and Tether’s blacklist enforcement is likely to continue intensifying. For market participants, building an active compliance system with professional KYT tools is not only essential for risk management but also a core competitive advantage in the evolving industry landscape. BlockSec Phalcon Compliance offers a simple, precise, and flexible solution to help various entities stay compliant and resilient amid regulatory upgrades.