Curriculum·J311 Privacy, Surveillance, and Compliance Exposure·about 33 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, 3.6 percent were unfrozen within the same year, and 55.6 percent of the frozen value was destroyed rather than held. Tether states that it works with law enforcement agencies across dozens of countries and has supported freezes running to billions of dollars.
- 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://cryptoslate.com/circle-blacklists-all-tornado-cash-eth-addresses-effectively-freezing-usdc/
Confidence medium·Volatility high·Reviewed 2026-08-06·Owner unassigned
Contested
Freeze totals differ substantially by source and by what is being counted, with figures for the same period ranging from about $1.26B for 2025 on two chains to cumulative multi-billion totals across all cooperation since 2023. The 2025 figures used here come from an on-chain event analysis that states its method and cross-checks against an independent dataset. The mechanism does not depend on the precision and the numbers should be re-derived rather than assumed current.
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.