Monitoring

Catch suspicious activity before your examiner does.

Submit transactions via API or batch upload. Our rules engine evaluates every one against configurable thresholds, velocity limits, and pattern detectors. Flagged activity surfaces as alerts instantly.

Rule types

Built-in rules for the patterns that matter

Start with our default rule set or build your own. Every rule is configurable per-org with custom thresholds, time windows, and severity levels.

Threshold

Flag single transactions that exceed a dollar amount. Configure per asset, per direction.

Any transaction > $10,000

Velocity

Detect unusual transaction frequency within a rolling time window.

> 5 transactions in 1 hour

Structuring

Catch multiple transactions just under reporting thresholds — a classic BSA red flag.

3+ transactions between $8K-$9.9K in 24h

Jurisdiction

Flag transactions involving wallets or entities linked to sanctioned or high-risk jurisdictions.

Wallet linked to DPRK, Iran, etc.

Counterparty

Identify transactions with unknown or unscreened wallets not in your entity registry.

Transfer to/from unregistered wallet

Pattern

Detect round amounts, rapid succession transfers, layering patterns, and other suspicious behavior.

Sequential round-number transfers

Submit. Evaluate. Act.

Every transaction you submit is evaluated against your active rule set in real time. When a rule fires, an alert is created and your team is notified via webhook and dashboard.

Real-time evaluation

Rules run on every transaction as it comes in.

Automatic wallet screening

Unknown wallets are screened before rules evaluate.

Severity-based decisions

Critical = block. High/medium = flag for review.

Full context

Alerts include the transaction, rule, and historical evidence.

submit-transaction.ts

const result = await decern.transactions.submit({
  type: "transfer",
  from_wallet: "0xabc...",
  to_wallet: "0xdef...",
  amount: "50000.00",
  asset: "USDC",
  chain: "ethereum",
});

// result.decision === "flag"
// result.alerts[0].rule === "Structuring"

Want to learn more about transaction monitoring?

Read the blog

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