Curriculum·J311 Privacy, Surveillance, and Compliance Exposure·about 34 min
Compliance exposure as a user
By the end of this lesson you can
- →Name the four layers at which a compliance action can reach you, and who acts at each
- →Explain why an issuer-controlled asset carries a freeze function that holding it consents to
- →Compute the reversal rate on freezes and what it implies for treating one as recoverable
- →Apply the four-question check before accepting a payment you did not arrange
Junior · enrolled learners
This lesson opens with Tether blacklisting through 2025.
- What happened
- The USDT contract exposes three functions callable only by its owner. addBlackList freezes an address so it can neither send nor receive the token while the balance remains visible. removeBlackList restores it. destroyBlackFunds permanently burns the balance and reduces total supply. Analysis of the on-chain events for 2025 recorded 4,163 unique addresses blacklisted holding $1.26B, split 3,506 addresses and $853.08M on Tron against 657 addresses and $402.97M on Ethereum. Of the addresses blacklisted during the year, 150, or 3.6 percent, were removed from the blacklist within the same year, and Tether burned $698M, 55.6 percent of the frozen value, rather than holding it. Tether stated in April 2026 that it works with more than 340 law enforcement agencies in 65 countries and that freezes it has supported exceed $4.4B in total.
- The decision point
- The freeze is not a policy that a company applies to an account you opened with it. It is a function inside the asset, and every holder of that asset is subject to it by holding it, including holders who never opened an account, never agreed to terms and never interacted with the issuer. The asset that settles without permission is settled by a permission you do not hold.
- Recorded loss
- $1,260,000,000
What you will be able to answer
- →What are the four layers?
- →What does holding an issuer-controlled asset consent to?
- →What is the reversal rate?
- →What is the pre-check on an unexpected payment?
Orientation and Year One are open: anyone can read them without an account. From Year Two onward the lessons are for enrolled learners, because progress through the later years only means anything if it is tracked against a record.
It is free. We do not sell the list and there is nothing to buy at the end of it.
Sources and review
- https://blocksec.com/blog/1-26-billion-frozen-usdt-blacklisting-on-ethereum-and-tron-in-2025
- https://crypto.news/tether-froze-over-500m-usdt-in-30-days-as-blacklist-total-hit-1-26b-in-2025/
- https://tether.io/news/tether-supports-freeze-of-more-than-344-million-in-usdt-in-coordination-with-ofac-and-u-s-law-enforcement/
- https://www.coindesk.com/business/2022/08/11/crypto-exchange-dydx-blocked-accounts-that-received-even-small-amounts-from-tornado-cash
- https://www.theblock.co/post/162928/dydx-confirms-blocking-user-accounts-tied-to-tornado-cash
- https://cryptoslate.com/circle-blacklists-all-tornado-cash-eth-addresses-effectively-freezing-usdc/
- https://decrypt.co/107090/tornado-cash-dusts-public-wallets-jimmy-fallon-brian-armstrong-steve-aoki-logan-paul
Confidence medium·Volatility high·Reviewed 2026-10-22·Owner unassigned
Contested
Freeze totals differ substantially by source and by what is being counted: about $1.26B for 2025 on two chains in BlockSec's event analysis, $3.29B across 7,268 addresses for 2023 to 2025 as crypto.news reports it, and more than $4.4B cumulative in Tether's own April 2026 statement. The 2025 figures used here come from BlockSec, which states its method, deduplicates to the first blacklisting per address, and cross-checks monthly counts against Dune Analytics queries. The mechanism does not depend on the precision and the numbers should be re-derived rather than assumed current.
The 3.6 percent is BlockSec's same-year figure: 150 of the 4,163 addresses blacklisted in 2025 were removed within 2025, with a median of 18.2 days for those that were. BlockSec counts 383 removals during the year, the other 231 for addresses blacklisted in 2024 or earlier, and says that historically about 6 percent of all blacklisted wallets have ever been removed. A longer horizon therefore shows a somewhat higher reversal rate, and the lesson uses the same-year figure and says so.
Per-address averages in part one are means, and BlockSec's balance table shows how far they are from typical: 1,404 of the 4,163 addresses, 33.7 percent, held exactly zero when frozen, while 275 addresses, 6.6 percent, held 75.2 percent of the frozen value. BlockSec gives no median balance and the lesson does not claim one.
This lesson describes how compliance actions reach a user and is not legal advice. It does not describe how to avoid an obligation, and per J311-03's editorial note the curriculum treats privacy and evasion as different activities.
F108 owns tax obligations and reporting. This lesson owns compliance actions taken against you by venues, issuers and services. Keep the split and route tax questions to F108-03.