How do I set up sanctions screening API checks for new business onboarding and ongoing entity monitoring?

A solid sanctions-screening setup usually has two layers:

1. Onboarding screening — check every new business/entity before you approve it.
2. Ongoing monitoring — re-screen existing entities whenever sanctions lists or entity data change.

Here’s a practical way to implement it with an API.

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1) Decide what you need to screen

For business onboarding, screen at minimum:

• Legal entity name
• Trade names / DBA names
• Registration number
• Country of incorporation / registration
• Address
• Website / domain
• Parent company / beneficial owners
• Key directors or controlling persons, if required by your policy

For ongoing monitoring, keep the same data plus:

• Internal customer ID
• Previous screening result ID
• Last screened timestamp
• Watchlist version / sanctions list version used

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2) Use an API-based screening flow

Typical API endpoints or actions:

• Create screening check
  Send entity data to the sanctions screening API.
• Get results
  Read matched sanctions hits, confidence scores, and status.
• Clear / false positive / escalate
  Mark a result as reviewed by compliance.
• Re-screen
  Run the same entity again when needed.

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3) Onboarding workflow

A common pattern:

1. Applicant submits company details.
2. Your system calls the sanctions screening API.
3. API returns:
   • no match,
   • possible match,
   • or confirmed match.
4. Apply rules:
   • No match → continue onboarding
   • Possible match → send to manual review
   • Confirmed match → block onboarding and escalate

Example onboarding decision logic

• Pass if no alert or only low-risk non-relevant match
• Review if fuzzy match, partial address match, or similar beneficial owner
• Fail if exact or high-confidence sanctions match

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4) Ongoing monitoring workflow

There are two ways to monitor existing entities:

A. Daily/periodic batch re-screening

• Re-screen all active entities every day, week, or month.
• Good for simpler setups.

B. Event-driven monitoring

Trigger re-screening when:

• sanctions list updates,
• entity name or address changes,
• beneficial owner changes,
• ownership structure changes,
• adverse events occur.

Best practice is usually both:

• periodic full re-screening
• immediate re-screen on material changes

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5) Handle sanctions list updates

Your screening system should know when sanctions data changes.

Recommended approach:

• Use a provider that exposes a list/version update timestamp or webhook
• Store the last list version used for each screening
• Trigger re-screening when a new list version is published

This is important because an entity that was clear yesterday may become a hit today.

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6) Match logic and thresholds

Use a scoring strategy, for example:

• 0–70: auto-clear
• 71–89: manual review
• 90–100: high-confidence hit / block

Also compare:

• exact legal name
• transliterations and aliases
• country
• address
• DOB for individuals
• registration identifiers
• ownership links

Don’t rely on name alone. For businesses, combine name + jurisdiction + address + identifiers.

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7) Build an audit trail

For compliance, store:

• request payload
• API response
• screening timestamp
• list version
• decision made
• reviewer ID
• evidence notes
• re-screen history

This is essential for audits and regulator questions.

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8) Example integration pattern

Onboarding

Create entity in CRM
→ Send entity to sanctions screening API
→ If clear, allow onboarding
→ If possible match, queue for review
→ If confirmed match, reject / escalate

Ongoing monitoring

Nightly job or webhook event
→ Fetch active entities
→ Re-screen entities changed since last run
→ Re-screen all entities after list update
→ Alert compliance on new hits

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9) API design tips

If you are building your own service around a sanctions vendor API, useful endpoints are:

• POST /screenings
  Create screening request
• GET /screenings/{id}
  Retrieve screening result
• POST /screenings/{id}/review
  Save compliance decision
• POST /entities/{id}/rescreen
  Re-run screening
• GET /alerts
  List unresolved alerts

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10) Recommended operational controls

• Require manual review for medium/high matches
• Use least-privilege access for screening results
• Encrypt PII and sensitive entity data
• Version your screening logic
• Keep SLA timers for review turnaround
• Re-screen after data corrections
• Set escalation rules for frozen, blocked, or rejected entities

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11) Minimal implementation checklist

• Choose a sanctions screening provider/API
• Define entity data schema
• Build onboarding screening call
• Build review queue for alerts
• Store audit logs and list version
• Add periodic batch re-screening
• Add event-driven re-screening on changes
• Create compliance decision workflow
• Test with known false positives and true hits

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If you want, I can also give you:

1. a sample API request/response design,
2. a Python/Node integration example, or
3. a full sanctions screening architecture diagram.