For fintech, payments and crypto compliance and engineering teams
The OFAC 50 Percent Rule and its data limitations
OFAC's 50 Percent Rule blocks an entity that is owned 50 percent or more, in the aggregate, by one or more blocked persons, even if that entity is not itself named on the SDN List. Screening a name against a list cannot see ownership, so this is a data problem before it is a matching problem. This page sets out what the rule requires and the ownership-data limits that every screening tool, including Verifex, inherits.
Primary sources
- OFAC, Revised Guidance on Entities Owned by Blocked Persons (13 Aug 2014)
The operative guidance: property of an entity owned 50% or more in the aggregate by one or more blocked persons is itself blocked, whether or not the entity appears on the SDN List.
- OFAC Sanctions Programs & FAQs (50 Percent Rule)
OFAC's FAQs on the 50 Percent Rule cover aggregation across multiple blocked owners and the treatment of entities not on the SDN List.
What the rule requires
The 50 Percent Rule looks through ownership. If one or more blocked persons own 50 percent or more of an entity in the aggregate, that entity is treated as blocked to the same extent as the underlying blocked person, even though OFAC may never add it to the SDN List.
Two features make this hard for screening alone. Ownership is aggregated across all blocked owners, so no single owner needs to hold 50 percent. And the rule applies to entities that are, by design, not on any list, so a clean name match against the SDN List does not answer the question.
Why screening a name does not answer it
- A name checked against sanctions lists tells you whether that name resembles a listed party. It says nothing about who owns the party.
- Ownership lives in company registries, filings and UBO data, separate sources with separate coverage, freshness and gaps.
- A 'no ownership match' frequently means 'no ownership data for this entity in this jurisdiction,' not 'no blocked owner.' Those are different facts and must not be collapsed.
A workflow that stays defensible
- 1Screen the counterparty name against current sanctions and watchlist sources, and record the source state.
- 2Separately resolve beneficial ownership where registry or UBO data exists for the jurisdiction, and aggregate ownership across any blocked owners.
- 3Record what ownership data was available and what was not, an unavailable registry is on the record, not hidden.
- 4Where ownership cannot be resolved to a confident conclusion, route the case to review rather than treating the name-level no-hit as a clear.
What Verifex does, and does not, claim
Verifex screens names and entities and, where ownership-graph data is configured, surfaces candidate ownership context alongside the coverage state. It returns the candidate, the sources checked, and what was unavailable.
Verifex does not claim to know every ownership chain. Where the underlying ownership data does not exist or was not reachable, the response says so, it does not manufacture a clean ownership result.
Limitations
- OFAC does not publish every entity captured by the 50 Percent Rule. Absence from the SDN List is not evidence that an entity is not owned by a blocked person.
- Ownership must be aggregated across multiple blocked owners; a check that only looks for a single 50%+ owner will miss combinations.
- Company and beneficial-ownership registries are incomplete, stale, access-restricted or unavailable in many jurisdictions. Verifex can only report ownership for which it has a source.
- The rule covers ownership, not control: an entity controlled but not 50%-owned by a blocked person is not automatically blocked under it, though OFAC may designate such an entity separately. Do not read a clean 50%-ownership result as a control clearance.
- This page is an implementation reference, not legal advice or an OFAC interpretation. Licensing and blocking decisions remain yours and, where required, your regulator's.
Build the evidence, not just the alert
Questions
Does the 50 Percent Rule only apply to entities on the SDN List?
No. It applies specifically to entities that may not be listed at all but are owned 50 percent or more, in the aggregate, by one or more blocked persons. That is why screening the name against the list is necessary but not sufficient.
Can any screening tool guarantee it catches every 50%-owned entity?
No, and a vendor that claims otherwise is overstating. Catching ownership depends on ownership data that is frequently incomplete or unavailable. An honest tool reports what it checked and what it could not, and routes the gap to review.
What is the safe default when ownership data is missing?
Treat missing ownership data as unresolved, not clear. Record the gap on the decision and route to human review, rather than letting a name-level no-hit stand in for an ownership conclusion.
This page is an implementation reference for engineering and compliance teams. It is not legal advice and does not certify any regulatory outcome. Regulatory obligations, their interpretation, and the decision to treat any result as clear remain yours. Verifex supports the workflow and preserves the evidence; it does not make the compliance decision.