OFAC False Negative Glossary Part 1

What a false negative is in sanctions screening, and why missing a match is the dangerous failure.

TL;DR

TL;DR: A false negative is a screening failure that misses a real match, letting a listed party or wallet through unflagged. Because OFAC enforcement is strict liability, a false negative can turn into a penalty starting at $356,000.

What a false negative is

In sanctions screening, a false negative occurs when a counterparty that is actually on the SDN List is not flagged, usually due to a name variation, a transliteration difference, or incomplete data. The transaction then proceeds as if the counterparty were clean.

Why false negatives matter

A false negative is the more dangerous of the two matching errors. A false positive only blocks an innocent payment, but a false negative allows a prohibited transaction. Under strict liability, intent is not required, so the missed match still produces a violation and a penalty starting at $356,000 per violation.

Reducing false negatives

The sanctionsai.dev API screens a counterparty before an agent pays and returns ALLOW or BLOCK in under 100 ms, against 19,218 SDN names and 947 OFAC-listed crypto wallets across 16 jurisdictions, synced hourly. Screening both names and wallet addresses reduces the surface for a miss. Not documented: the product's specific false negative rate.