From public reporting. This is a real case, not Chainsentra's own work. It's included to show how blockchain intelligence — the same kind of tracing Chainsentra does — supports real investigations. Outcomes vary by case.
In November 2023, the US Department of Justice seized about $9 million in USDT tied to a romance-fraud network, after Tether froze the funds on investigators' request. What makes this case worth a closer look isn't the size of the seizure — it's smaller than several others on this site — but the laundering method investigators had to work through to get there: chain hopping.
What is chain hopping?
Chain hopping means moving stolen or defrauded funds through several different cryptocurrencies, usually on different blockchains, in quick succession. A typical sequence might convert bitcoin to ether, swap the ether for a token on another network through a bridge, then convert again into a stablecoin — each step landing the funds somewhere that looks, on its own ledger, like a fresh transaction with no visible history.
US Secret Service investigators in this case specifically described the laundering technique they encountered as chain hopping — officials used that exact term in discussing how victim deposits were moved before the funds were traced and frozen.
Why would chain hopping fool an investigator?
Each blockchain has its own public ledger, its own tools for reading it, and often its own set of attributions for which addresses belong to which services. Moving funds from one chain to another means an investigator following the trail has to:
- Confirm the swap or bridge transaction actually connects the sending and receiving addresses.
- Switch to reading the destination chain's ledger, which may use entirely different conventions.
- Re-establish attributions on the new chain, since a label that applies on one network doesn't automatically carry over.
Do that three or four times in a row, across several hops, and the cumulative effort can be substantial. That's the whole point, from a fraud operator's perspective: not to make tracing impossible, but to make it expensive enough in time and resources that many cases get abandoned along the way.
Why it didn't work here
Despite the chain hopping, investigators successfully traced victim deposits through the sequence of conversions to where the funds ultimately landed, and Tether was able to freeze the USDT once the destination wallets were identified. A few structural reasons this kind of trace can succeed even against a determined laundering attempt:
| Why chain hopping has limits | What it means in practice |
|---|---|
| Every chain is still public | Each hop leaves its own permanent, readable record — nothing is deleted when funds move to a new chain |
| Swaps and bridges leave a link | The transaction that moves value from one chain to another is itself visible and can usually be matched by timing and amount |
| Funds eventually need to be useful | Laundered funds typically have to reach an exchange or stablecoin issuer to be spent, which is often where a freeze becomes possible |
| Patterns repeat | The same fraud network often uses the same chain-hopping route for multiple victims, so one successful trace can expose the pattern for others |
What this means if your case involves multiple cryptocurrencies
If you sent funds that you believe moved through more than one blockchain, that's worth telling an investigator explicitly, along with every transaction hash and wallet address you have for each step. A multi-chain case takes longer to document than a single-chain one, but this case shows it's far from a dead end. How tracing works covers the mechanics of following funds across chains and through mixers and bridges in more detail.
Chainsentra's investigations follow the same principle shown here: funds don't disappear just because they change chains, they become harder to follow, and documenting each hop with its source is what makes the resulting evidence report useful to police, a lawyer or an exchange. A freeze or seizure like the one in this case is decided by law enforcement and the courts, not by Chainsentra, and isn't something any honest investigator can promise in advance.
Key takeaways
- Chain hopping means moving funds through several different cryptocurrencies to make them harder to trace.
- In this case, US Secret Service investigators still traced the funds and Tether froze about $9 million in USDT.
- Every blockchain involved keeps its own public, permanent record, and swaps or bridges between chains still leave a traceable link.
- Multi-chain tracing takes more time and more detail from you, but it is routine, not exceptional.
Further reading
- Romance fraud: how it works
- How tracing works
- The $225 million pig butchering seizure
- Start a free assessment
Source: US Department of Justice, reported by CoinDesk, November 2023.