What is OFAC enforcement for crypto?

OFAC enforces sanctions in crypto through designations, exchange and mixer actions, and civil penalties under strict liability.

TL;DR

TL;DR: OFAC enforcement for crypto means designating wallets, exchanges, and mixers, then issuing civil penalties against anyone who transacts with them. Intent is not required, and penalties start at $356,000 per violation.

What enforcement looks like

OFAC, the Office of Foreign Assets Control, adds crypto addresses to the SDN List the same way it lists people and companies. Once listed, US persons must block those wallets. OFAC also acts against exchanges and mixers that facilitate sanctioned activity, and can refer cases for criminal prosecution alongside the civil side.

The penalty structure

Sanctions violations are strict liability: intent is not required. Civil penalties start at $356,000 per violation, and the 50 Percent Rule extends the block to any entity 50 percent or more owned by a blocked person. A single payment to a listed wallet is enough to trigger exposure, even if the sender did not know.

Why crypto is a priority

Wallets move value in seconds, so screening has to happen before the transaction, not after. SanctionsAI screens 947 OFAC-listed crypto wallets in a single HTTP call under 100 ms, returning ALLOW or BLOCK so an agent or exchange can stop a flagged transfer before funds move. That front line check is the difference between a blocked payment and a penalty. Screening each address before settlement is the control that turns a fast rail into a compliant one. The screen is cheap and instant, so there is no reason to skip it on any single transfer.