Sanctions Screening Checklist: Vet Every Party

Sanctions screening is the process of checking every customer, vendor, bank, and counterparty against U.S. government restricted-party lists before money or goods change hands. It is the single most important control in any sanctions compliance program, because a U.S. person who deals — even unknowingly — with a blocked party can face strict-liability civil penalties. This checklist walks through what to screen, which lists to use, and how to resolve and document a potential hit.

Screening is one of the internal controls OFAC expects under its sanctions compliance checklist framework. Done well, it turns a vague legal duty into a repeatable step your team runs on every deal.

What to Screen

Screen every party to a transaction, not just the named buyer. The obligation runs to anyone you transact with, so a complete screen captures the full chain of a deal.

• Customers and end users, including the ultimate consignee, not just the broker or freight forwarder.
• Vendors, suppliers, and subcontractors who receive your payments.
• Banks and intermediaries named in a letter of credit or wire instruction.
• Owners, principals, and beneficial owners of any entity counterparty.
• Shipping and logistics parties — vessels, ports, and carriers can themselves be listed.

Screen at onboarding, before each transaction, and again whenever the lists change. OFAC updates its lists frequently and without warning, so a party that cleared last quarter may be listed today.

Which Lists to Check

OFAC publishes two core lists, and most exporters also screen the Commerce and State restricted-party lists in the same pass.

OFAC’s free Sanctions List Search tool screens the SDN and Consolidated lists with fuzzy-matching logic that catches spelling variations and transliterations. For any meaningful transaction volume, commercial screening software that covers all of the lists above is the practical choice.

The 50% Rule

An entity that is owned 50% or more — directly or indirectly, in the aggregate — by one or more blocked persons is itself blocked, even if it never appears on the SDN List. This is OFAC’s 50 Percent Rule, and it is where screening most often fails: the named counterparty is clean, but its majority owner is an SDN.

Two points matter in practice. First, ownership aggregates: if two different SDNs each own 25% of a company, the company is blocked. Second, the rule speaks to ownership, not control — an entity merely controlled (but not 50% owned) by a blocked person is not automatically blocked, though OFAC cautions against dealing with it. Because the rule reaches unlisted entities, name screening alone is never enough; you also have to map ownership. That ownership analysis is the heart of the sanctions due diligence checklist.

Step-by-Step Screening

Run the same sequence on every transaction so nothing depends on memory or judgment in the moment.

1. Collect full legal names and addresses for every party identified above, plus dates of birth or registration numbers where available — more identifiers mean fewer false hits.
2. Run the names through your screening tool against all applicable lists.
3. Resolve every potential match before proceeding (see below). Do not release goods or funds on an unresolved hit.
4. Apply the 50% Rule by checking the ownership of each entity counterparty against the SDN List.
5. Document the result — clean or hit — with a timestamp, the lists and version screened, and who reviewed it.
6. Re-screen existing parties when the lists update and before each new transaction.

Resolving a Potential Hit

A screening “hit” is a possible match, not a confirmed one. Work it before you act either way.

When the tool flags a name, compare all available identifiers — full name, date of birth, address, nationality, identification numbers — against the list entry. If the identifiers do not line up, it is likely a false positive: document why and proceed. If they do match, treat it as a true match and stop the transaction.

On a confirmed match to an SDN, you must block (freeze) the property or interest in property, reject the transaction, and report the blocked or rejected transaction to OFAC. Blocked-property reports are due within 10 business days. Where the deal might still go forward, the path is often an OFAC license — see how to apply for OFAC licenses and understand sanctions exemptions. When you are unsure, hold the transaction and get advice before releasing anything.

Keep the Records — Now 10 Years

Document each screen and keep the record. As of March 12, 2025, OFAC’s recordkeeping period under 31 CFR 501.601 runs 10 years, up from five, tracking the longer statute of limitations for sanctions violations. Your screening logs are the evidence that you ran the control. The sanctions record keeping checklist covers what to retain and for how long.

Frequently Asked Questions

Is sanctions screening legally required? There is no single statute that says “screen names,” but U.S. sanctions liability is generally strict — you can be penalized for dealing with a blocked party even if you did not know. Screening is how you avoid that, and OFAC treats it as an expected internal control.

Does a name match mean I broke the law? No. A hit is a potential match that you must investigate. Many are false positives resolved by comparing identifiers. A violation arises only if you actually transact with a blocked party.

Do I need paid software, or is the OFAC tool enough? OFAC’s free Sanctions List Search works for low volume and one-off checks. Higher volume, full list coverage, ownership mapping, and audit-ready logs generally call for commercial software.

Who do I have to screen? Every party to the transaction — customer, end user, vendor, bank, intermediary, and the beneficial owners of any entity — not just the company on the invoice.

Sanctions screening is a control you can implement this week, but the harder calls — ambiguous ownership, a possible true match, or whether a deal needs a license — are where exporters get exposed. Reidel Law Firm prepares flat-fee Import/Export Compliance Memos that pressure-test your screening process and answer the close questions, with direct access to the trade attorney handling your matter. Get an export compliance memo →