What is Sanctions Screening?

1 min read Updated

Sanctions screening is the process of checking cryptocurrency addresses and transactions against sanctions lists maintained by authorities like OFAC, EU, and UN — to prevent interactions with sanctioned entities, persons, or jurisdictions.

WHY IT MATTERS

Sanctions compliance is non-negotiable for regulated entities. OFAC (the US Office of Foreign Assets Control) maintains a list of sanctioned addresses — interacting with them can result in civil penalties up to $300,000+ per violation. Similar regimes exist in the EU, UK, and other jurisdictions.

For blockchain transactions, screening involves checking recipient addresses against known sanctioned addresses, using blockchain analytics to identify indirect connections to sanctioned entities, and monitoring for addresses associated with sanctioned jurisdictions.

AI agents making autonomous transactions need automated sanctions screening. An agent that sends funds to a sanctioned address creates legal liability for the operator — even if the agent didn't 'know' the address was sanctioned. Screening must be built into every transaction flow.

HOW POLICYLAYER USES THIS

PolicyLayer can integrate sanctions screening into agent transaction policies — automatically blocking transactions to sanctioned addresses before they execute. This ensures compliance without requiring the agent to understand sanctions law.

FREQUENTLY ASKED QUESTIONS

What happens if an agent transacts with a sanctioned address?
The operator bears legal responsibility. Penalties can include fines, criminal charges, and business restrictions. The 'agent did it' is not a defense — operators are responsible for their agents' compliance.
How are sanctioned addresses identified?
OFAC publishes the SDN (Specially Designated Nationals) list with known addresses. Blockchain analytics firms (Chainalysis, TRM Labs, Elliptic) provide extended screening that identifies addresses connected to sanctioned entities through on-chain analysis.
Is sanctions screening required for all crypto transactions?
Legally, yes for US persons and entities. OFAC sanctions apply to all US person transactions regardless of platform. Many other jurisdictions have similar requirements. DeFi protocols increasingly implement screening voluntarily.

FURTHER READING

Enforce policies on every tool call

Intercept is the open-source MCP proxy that enforces YAML policies on AI agent tool calls. No code changes needed.

npx -y @policylayer/intercept
github.com/policylayer/intercept →
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