By · · last updated 2026-08-08

Mixers, OFAC Designations, and the Agent That Won't Know

Tornado Cash, Blender, Sinbad — OFAC has designated crypto mixers since 2022. Why mixer addresses are on the wallet list, and what that means for agents.

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OFAC started designating crypto mixers in 2022, and the actions are a direct precedent for agent compliance: interacting with a designated address — even through code — is prohibited.

The record

Blender.io (May 2022): first mixer designation, linked to North Korean cyber operations.
Tornado Cash (August 2022): designated addresses including smart contracts — establishing that contract-level interaction is in scope.
Sinbad (November 2023): designated as a primary money-laundering concern supporting Lazarus Group.

What this means for agents

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Mixer addresses are on the wallet list (the 947 includes them). An agent that routes a payment through or into a designated mixer address commits the same violation as a human. The screen catches it — if the screen runs before the payment.

The pattern

Every designation follows the same compliance shape: the address lands on the list, and the next transaction to it is prohibited. Screening the destination wallet before sign — every time — is the only control that scales to autonomous agents.

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