A historical review or lookback is warranted when previously unidentified data elements, missing reference data, or newly discovered customer attributes are detected that may have impacted earlier screening results. Sanctions and Compliance Domains explain that such scenarios indicate that past alerts may not have been correctly generated or evaluated, necessitating a retrospective review.
Routine list updates or daily refreshes do not automatically trigger lookbacks. New sanctions programs may require enhanced forward-looking monitoring, but only missing or newly uncovered data affecting past screening results justify a historical lookback.
Reference:
Requirements for lookbacks when gaps in screening data are discovered.
Identification of previously missing identifiers as a trigger for retrospective review.

Sanctions and Compliance Domains specify that correspondent banking relationships require a comprehensive assessment of the respondent bank's sanctions risk exposure. Relevant factors include:
* Licensing authorities - Banks licensed in jurisdictions with weak sanctions controls, inadequate supervision, or misaligned regulatory frameworks pose heightened risk. Regulatory oversight directly influences sanctions compliance effectiveness.
* Location of operations - Geographies influence exposure to sanctioned countries, transshipment risks, proliferation financing threats, and proximity to high-risk jurisdictions. Geographic expansion may introduce new sanctions obligations and monitoring requirements.
* Products and services offered - Certain products (e.g., trade finance, cross-border payments, payable-through accounts) carry inherently higher sanctions risk. As respondent banks expand their service offerings, the correspondent institution must reassess associated risks.
The registration number is not relevant to sanctions exposure. Bank representatives may factor into KYC but are not core sanctions-risk elements. The respondent's customers' business activity is considered indirectly through the respondent bank's controls and risk profile, but primary assessment focuses on the bank's licensing, geography, and product set.
Reference:
Sanctions risk assessment expectations for correspondent banking relationships.
Consideration of licensing, geographic exposure, and product/service risk.
Regulatory requirements for understanding respondent bank activities and oversight.

The Wolfsberg 2019 Guidance identifies risk assessment as a foundational component of sanctions screening programs. Screening systems, list management, and alert handling must reflect the institution's assessed sanctions risk exposure.
External audit and reporting are relevant compliance functions but are not listed as fundamental pillars of screening programs in the Wolfsberg framework. Risk management is a broader corporate discipline, while screening specifically starts with a clear sanctions risk assessment.
Reference:
Wolfsberg 2019 Guidance on Sanctions Screening fundamentals.
Requirement that screening be risk-based and aligned with sanctions risk assessment outcomes.

Sanctions and Compliance Domains emphasize that sanctions screening depends on traceable identifiers, transparent transaction histories, and clear counterparties. Privacy coins and mixers/tumblers significantly obscure blockchain transaction trails.
A tumbler or mixer intentionally blends cryptocurrency from multiple sources, making it extremely difficult to determine the origin of funds, the identities of transacting parties, or any links to sanctioned entities. This creates a high sanctions-related risk because sanctioned actors or jurisdictions may exploit these services to disguise involvement.
Privacy coins alone pose risk due to anonymity, but the mixer/tumbler function specifically disrupts sanctions screening capabilities. Financial institutions and exchanges cannot rely on upstream partners to conduct due diligence.
Reference from Sanctions and Compliance Domains:
Risks of anonymity-enhancing technologies (AETs) in sanctions compliance.
Screening limitations created by mixers/tumblers and privacy-preserving blockchain tools.
Guidance highlighting elevated sanctions risks in digital asset transactions lacking traceability.

Sectoral sanctions target specific sectors of a foreign country's economy, such as defense, energy, mining, or financial services. These sanctions apply to persons or entities operating within those sectors and often restrict specific types of transactions (e.g., certain financing or technology transfers).
Comprehensive sanctions cover entire jurisdictions. Individual or corporate sanctions apply to specific persons or companies but are not sector-based.
Reference:
Definition of sectoral sanctions using economic sector targeting.
Distinction between sectoral and comprehensive sanctions.