Nils Silinevics
Partner · AML & Crypto Compliance · Former FIU Investigator
You've received a formal notice that your account is under AML review on Circle (USDC). Circle (USDC) operates at the blockchain level, not the exchange level. Instead of freezing accounts, Circle (USDC) freezes individual wallet addresses directly in the smart contract — making your tokens permanently untransferable on that address. Circle can freeze both sending AND receiving of USDC — more comprehensive than Tether, which only blocks sending. Circle is regulated as a money transmitter in 47 US states, making them subject to stricter compliance but also more predictable resolution processes. Circle freezes USDC by adding addresses to the blacklist in the FiatToken smart contract, blocking both incoming and outgoing transfers. You receive a formal notice that your account is under AML review. This is more serious than a simple KYC request — it means the platform's compliance team suspects your activity may violate anti-money-laundering regulations.
Circle freezes USDC by adding addresses to the blacklist in the FiatToken smart contract, blocking both incoming and outgoing transfers. Circle can freeze both sending AND receiving of USDC — more comprehensive than Tether, which only blocks sending. Circle is regulated as a money transmitter in 47 US states, making them subject to stricter compliance but also more predictable resolution processes. This background matters because it shapes how Circle (USDC) handles compliance — and how we approach resolving your case.
The compliance framework: Circle (USDC) operates under US Bank Secrecy Act + OFAC compliance + state money transmitter laws, overseen by US state money transmitter licenses + FinCEN. Their compliance infrastructure uses internal + TRM Labs for blockchain analytics and n/a (address-level, not account-level) for identity verification. Circle (USDC) is known for fully-backed US dollar stablecoin with monthly attestations, serving institutional and retail users who need transparent USD-pegged crypto — and their compliance team is calibrated to flag deviations from typical user behavior in that segment.
What triggers aml review on Circle (USDC):
Real case — dual-direction freeze: A DeFi user's address was blacklisted by Circle because it had interacted with Tornado Cash — even though the interaction was a legitimate withdrawal from a mixing protocol the user didn't know was sanctioned. The user couldn't send OR receive USDC on that address. We documented that the Tornado Cash interaction preceded the OFAC sanction date and that the user had no knowledge of the protocol's sanctions status at the time of use. Circle unblacklisted the address after 8 weeks.
What Circle (USDC) requires to resolve this: Depending on the trigger, Circle (USDC) may ask for government-issued photo ID (verified through n/a (address-level, not account-level)), proof of address (utility bill or bank statement within 3 months), source-of-funds documentation (exchange statements, bank records, payslips, tax returns, or business documents), detailed transaction explanations with on-chain evidence, and in some cases a video verification interview. The challenge: Circle (USDC) rarely tells you which specific trigger caused the aml review, so you're guessing at what documentation to provide — and each rejected submission makes the next one harder.
Our approach is specific to Circle (USDC): Circle's US regulatory framework (money transmitter licenses, FinCEN registration, OFAC compliance) makes them more responsive to legal submissions than Tether — but also more cautious. We prepare a submission that specifically addresses OFAC compliance: if the address interacted with a sanctioned entity before the sanction date, we argue that the interaction predates the sanction and should not trigger a freeze. For post-sanction interactions, we demonstrate lack of knowledge and good faith.
AML Review on Circle (USDC) — our strategy: We prepare a comprehensive AML compliance package: transaction tracing, source-of-funds documentation, explanation of trading patterns, and a legal cover letter demonstrating your compliance with applicable AML regulations in the platform's jurisdiction.
The submission that matters: Instead of submitting through Circle (USDC)'s standard support channels (where you'll get automated responses or generic template replies), we prepare a professional legal submission — a structured compliance package with a cover letter from a Swiss law firm citing US state money transmitter licenses + FinCEN obligations and US Bank Secrecy Act + OFAC compliance + state money transmitter laws. Circle (USDC)'s compliance team processes legal submissions differently from regular user tickets — they're assigned to senior compliance officers, not support agents, and they bypass the automated response loop that delays most cases by weeks.
When standard compliance isn't enough: Some situations fall outside the normal compliance flow — inherited crypto holdings, accounts registered under another person's name, unprovable source of funds through conventional documentation, or cross-jurisdictional complications where your residence, the exchange's jurisdiction, and the fiat banking path all differ. If that sounds like your case, our complex cases practice handles scenarios that other firms decline.
Further reading: our guide on crypto AML laws across Europe covers the documentation and legal strategy in more depth.
We determine the scope of the AML review: is it a standard periodic check, a transaction-triggered review, or a regulatory request? {p_name} must tell you the legal basis — we ensure they do.
We prepare a comprehensive AML compliance package: transaction tracing, source-of-funds documentation, explanation of trading patterns, proof of legitimate business activity, and a legal cover letter referencing {aml_law}.
We submit directly to {p_name}'s AML/compliance team — not standard support. Our submission references {regulator} guidelines and the legal framework under which {p_name} must complete the review within a reasonable time.
AML review completed — account fully restored. We advise on transaction patterns that triggered the review and how to avoid future AML flags on {p_name}.
No. Unlike Tether (which only blocks sending), Circle blocks BOTH sending and receiving. If your address is on Circle's blacklist, you cannot send USDC from it AND you cannot receive USDC to it. This is more comprehensive than Tether's freeze and makes the situation more urgent — you can't even receive a rescue transfer to the frozen address.
Three key differences: (1) Circle blocks both directions (send + receive); Tether only blocks sending. (2) Circle is US-regulated (money transmitter licenses in 47 states, FinCEN registration) — more predictable but more cautious. (3) Circle uses TRM Labs for risk assessment; Tether uses a mix of internal screening and Chainalysis. The resolution process is different: Circle responds to OFAC-specific legal arguments; Tether responds to BVI regulatory arguments.
An AML review is a formal process for investigating whether your account activity violates anti-money-laundering laws. Unlike a simple KYC check, an AML review examines the source of your funds, the pattern of your transactions, and the risk profile of addresses you interact with. Blockchain analytics tools assign risk scores that trigger these reviews.
KYC (Know Your Customer) verifies your identity — who you are. AML (Anti-Money Laundering) examines your activity — what you're doing with your account. You can pass KYC and still trigger an AML review if your transaction patterns are flagged. An AML review is more serious and harder to resolve without professional help because it involves transaction analysis, not just document submission.
Yes. If the compliance team determines that your activity constitutes suspicious activity, they are legally obligated to file a Suspicious Activity Report (SAR) with their local Financial Intelligence Unit. This could trigger a law enforcement investigation. Our involvement helps ensure your activity is presented in context that doesn't trigger unnecessary suspicion.
Tell us what triggered the AML review and what documentation they requested. We respond within 6 hours.