What Is Sanctions Screening? A Plain-English Guide for 2026
Sanctions screening explained: what it is, why regulators require it, which lists to screen against (OFAC, EU, UK, UN), and how to do it without drowning in false positives.
Sanctions screening is the process of checking a person, company, vessel, aircraft, or transaction against official government sanctions lists before doing business with them. If a match is confirmed, you're generally prohibited from onboarding the customer, processing the payment, or shipping the goods — and in most jurisdictions you must also freeze (block) any assets you hold and file a report with the relevant regulator.
Almost every regulated business has to do it. Banks, payment processors, crypto exchanges, fintechs, insurers, law firms, real estate agents, freight forwarders, and exporters all have sanctions screening obligations under AML, CFT, and export-control regimes. Increasingly, marketplaces and SaaS platforms with international customers do too.
The four lists that matter most are the OFAC SDN (Specially Designated Nationals) list and OFAC Consolidated Sanctions List from the U.S. Treasury; the EU Consolidated Financial Sanctions List published by the European External Action Service; the UK Sanctions List published by OFSI; and the UN Security Council Consolidated List. Country-specific regimes (Switzerland's SECO, Canada's OSFI, Australia's DFAT, Japan's METI) add further coverage depending on where you operate.
Effective sanctions screening is more than a name lookup. Real names are messy: they come in different scripts, with inconsistent transliterations, with honorifics, with reordered tokens, with partial dates of birth. A good screening workflow uses fuzzy matching with controllable thresholds, normalizes accents and punctuation, applies word-boundary logic, scores alias matches lower than primary-name matches, and lets analysts corroborate with secondary identifiers like passport numbers or nationality before reaching a decision.
The biggest pitfall isn't missing a true match — it's burying analysts in false positives so that real hits get rubber-stamped as 'no match'. A risk-based screening program tunes thresholds, documents every decision, and re-screens existing customers when the underlying lists change, not just at onboarding.
SanctionsScreening offers a free OFAC SDN list search plus EU, UK and UN coverage in a single unified interface. For higher volumes, AI risk summaries, batch CSV uploads, and API access, see the pricing page.