1/ NEW: Last night, DEF, @paradigm, @btcpolicyorg, @BlockchainAssn, @crypto_council, @DigitalChamber, @SolanaInstitute, & @UniswapFND, filed an amicus brief in @LewellenMichael’s case against the DOJ in support of Lewellen’s opposition to the DOJ’s motion to dismiss. Let’s dive in 🧵

2/ First, a refresher on what this case is all about. In Jan. 2025, Michael Lewellen filed a preemptive lawsuit against the DOJ for unfairly prosecuting noncustodial software developers as operators of money transmitting businesses under 18 U.S.C. §1960, the federal criminal statute which proscribes failing to register a “money transmitting business.” The key issue contemplated in this case is whether Lewellen, in his plan to publish a DeFi protocol, engages in an unlawful activity under 18 U.S.C. §1960.

3/ Lewellen asserts a Declaratory Judgment Act (DJA) claim, asking the court to declare that he is not operating a "money transmitting" business and that he is not a "money transmitter," a First Amendment claim "that the money-transmitting laws are unconstitutional insofar as they apply to Lewellen’s writing and publishing of non-custodial and immutable software,” and a Fifth Amendment claim that the DOJ's interpretation of the money transmitting laws violates his Due Process rights.

4/ As DEF has said through its past advocacy, prosecuting developers of noncustodial p2p software under 18 U.S.C. § 1960 for operating “unlicensed money transmitting businesses,” is legally incorrect and unfair. The DOJ pushing a radical new theory of criminal liability via criminal indictment, and in direct contravention of 2019 FinCEN Guidance, violates Due Process and fair notice principles, and makes the U.S. less competitive.

5/ Our amicus brief makes the following arguments:

6/ As we argue, “…to be subject to prosecution under § 1960 for “unlicensed money transmitting”—under any of the statute’s definitions of “money transmitting”—a person must have taken custody or control of another person’s funds. Yet, despite §1960’s “clear limits” the Government is actively prosecuting developers of noncustodial p2p software for “unlicensed money transmitting.” Look no further than the cases against the developers of Tornado Cash and Samourai Wallet.

7/ But the Government’s theory is wrong on the law.

8/ Ultimately, the Government’s theory of liability generates legal uncertainty, chills the development of LAWFUL digital asset tools, and potentially leads developers to move offshore or cease creating their tools entirely.

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10/ By submitting this amicus brief, DEF and our partners believe that declaratory relief is appropriate. Participants in the digital asset industry “are entitled to receive clarification from this court before stifling their [lawful] practices or otherwise exposing themselves to punishment.”

end/ We are thankful to our partners, and appreciate the extremely talented team at @JonesDay for their help with this amicus brief. You can read the full amicus brief at the link below 👇