Home › Sanctions Knowledge Hub › Sanctions Screening Basics

Sanctions Screening Basics – Simple Guide for Compliance Teams

Sanctions screening is one of the most important controls in preventing financial institutions from engaging with restricted individuals, companies, vessels, or countries.

This guide explains sanctions, screening, false positives, and how real compliance teams handle sanctions risk.

What Are Sanctions?

Sanctions are restrictions or penalties issued by governments, regulators, or international organizations to prevent:

• Terrorism financing
• Weapons proliferation
• Human rights violations
• Drug trafficking
• Financial crime
• Geopolitical threats

Institutions must ensure they do not do business with any sanctioned person, entity or vessel.

Types of Sanctions (Simple Breakdown)

• Individual sanctions – specific persons
• Entity sanctions – companies, banks, or organizations
• Sectoral sanctions – industries or economic sectors
• Trade sanctions – import/export restrictions
• Vessel sanctions – ships used for high-risk activities
• Country-level sanctions – embargoes or broad restrictions

Major Sanctions Lists Every Analyst Should Know

• OFAC SDN List (U.S.)
• EU Consolidated List
• UN Sanctions List
• UK OFSI List
• Local/National Sanctions Lists
• Sectoral Sanctions (SSI lists)

Organizations must screen against all lists required by their regulatory jurisdiction.

What Is Sanctions Screening?

Sanctions screening compares customer details against sanctions lists to detect:

• Name matches
• Address matches
• Date-of-birth matches
• Vessel or company name matches
• Aliases, partial matches, close spelling variations

Screening happens at onboarding, during periodic reviews, and whenever a customer's details change.

False Positives vs True Matches

✔ False Positive

A match that looks similar but is not actually the sanctioned person/entity. These must be reviewed and cleared carefully.

✔ True Match

The customer is the sanctioned person/entity → requires immediate escalation, blocking, or reporting.

Common Red Flags in Sanctions Screening

• Multiple name variations
• Customers reluctant to provide ID
• Unclear ownership structure
• Use of shell companies or offshore entities
• Connections to high-risk jurisdictions
• Adverse media that mentions sanctions or investigations

How Sanctions Screening Works Inside Real Compliance Teams

In most institutions, sanctions screening flows through these steps:

1. Customer or transaction is screened automatically by a tool
2. Alerts are generated (false positives or potential matches)
3. Analyst reviews for accuracy and context
4. Documentation of decision (clear or escalate)
5. Escalation to AML/Sanctions team for true matches
6. Blocking or rejecting transactions/accounts if required

Frequently Asked Questions (FAQ)

Which customers require sanctions screening?

All customers — individuals, corporates, vessels, and sometimes intermediaries or UBOs — must be screened.

Does screening happen only at onboarding?

No. Screening happens at onboarding, during ongoing monitoring, and whenever new sanctions lists are updated.

Are all matches considered true sanctions hits?

No — many alerts are false positives. Analysts must compare DOB, nationality, aliases, and other identifiers before making a decision.