Specially Designated National (SDN)

What makes someone or something an SDN

A Specially Designated National, or SDN, is a person, company, vessel, or other entity that OFAC has formally determined falls into one of two broad categories: owned or controlled by, or acting for or on behalf of, a targeted country, or designated under a programme that isn’t country-specific at all, such as counter-terrorism or narcotics trafficking. Once designated, an SDN’s assets in US jurisdiction are blocked, and US persons are generally prohibited from dealing with them, directly or indirectly.

SDN status is a legal determination, not a description of physical location. SDNs can be situated anywhere in the world, and a designation isn’t limited to nationals of the country a programme is named after; front companies, intermediaries, and individuals of any nationality acting on a targeted country’s behalf can all be designated.

Two distinct paths to SDN status

OFAC’s own guidance distinguishes two structurally different ways a designation happens. List-based sanctions target specific individuals or entities OFAC has named directly, terrorists, narcotics traffickers, or those acting for a comprehensively sanctioned regime. Comprehensively sanctioned country programmes, such as those covering Syria or North Korea, also include an SDN component, but not every SDN designation is tied to a comprehensively sanctioned country; several programmes, like counter-narcotics trafficking sanctions, designate individuals and entities located across many different countries under a single, non-geographic programme.

The 50 Percent Rule extends SDN status automatically

An entity doesn’t need to be individually named to acquire SDN status. Any entity owned 50% or more, individually or in aggregate, by one or more SDNs must itself be treated as an SDN, automatically, under OFAC’s 50 Percent Rule, regardless of whether that entity ever appears in the published list by name. This is precisely why sanctions compliance requires tracing ownership structures, not just checking a counterparty’s own name against a list.

What SDN status actually blocks

Once someone is designated, the practical consequences are severe and immediate: their assets within US jurisdiction, or under the control of a US person anywhere, are blocked, and US persons are prohibited from engaging in virtually any transaction or dealing with them, directly or through an intermediary, without a specific licence from OFAC. This isn’t a reporting obligation or a heightened-scrutiny requirement; it’s a legal prohibition on dealing with the designated party at all.

A history that goes back further than most content acknowledges

OFAC’s own archive of changes to the SDN List runs back to 1994, and the office maintains only active, current versions of its lists for policy and legal reasons, rather than publishing a permanent historical snapshot. That means an entity’s designation history has to be reconstructed from year-by-year change archives rather than pulled from one continuous historical record, which matters for anyone researching a name’s designation status at a specific point in the past rather than its current status.

A real, documented example: North Korea designations

Executive Order 13722, part of the sanctions response to North Korea’s weapons programmes, illustrates how a designation round actually works in practice. The order added named senior officials, including figures such as Kim Yong Chol and Hwang Pyong So, alongside institutions including the Central Military Commission of the Korean Workers’ Party and the General Reconnaissance Bureau, plus a further set of vessels and entities, largely shipping and trading companies acting on the regime’s behalf. A separate, broader non-proliferation of weapons of mass destruction list added dozens more individuals and entities connected to the same underlying programme.

That example shows designation rounds typically bundle named senior officials, the institutions they control, and the commercial and logistics entities, shipping companies, banks, front businesses, that keep the underlying activity funded and moving.

Designations happen on no fixed schedule

OFAC’s own guidance is direct about update frequency: the SDN List is updated frequently, but there’s no predetermined timetable. Names are added or removed as necessary and appropriate, which in practice means a firm cannot assume designations follow any predictable cycle. This is exactly why continuous re-screening, not a check performed once at onboarding, is the only approach that actually keeps pace with how the list changes.

SDN isn’t OFAC’s only designation category

Being an SDN is the most severe designation OFAC applies, but it isn’t the only one. OFAC also maintains other, narrower lists carrying different legal consequences: sectoral sanctions that restrict specific types of transactions with a listed entity without a full asset block, and other non-SDN designations that trigger more limited restrictions. Treating “on OFAC’s list” as a single, uniform category misses this distinction; the specific list a name appears on determines exactly what’s actually prohibited, not just that some restriction applies.

Where SDN status shows up in a firm’s own due diligence

For a regulated firm, SDN screening is the strictest tier of sanctions screening: a confirmed match means an outright prohibition, not an enhanced-scrutiny trigger the way a PEP match is. That distinction matters for how a firm’s escalation process should be built. A PEP match triggers a defined enhanced due diligence process; a genuine SDN match triggers an immediate block on the relationship or transaction, with no discretionary risk-based judgement call available the way there is for other elevated-risk categories.

Frequently asked questions

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