Anomaly Detector is the second line of defense after Spending Patrol. It looks at patterns across your accounts as a whole - same charge posted twice on the same day from different account paths, refunds that never landed, transfers that show up in one account but not the other.
Two charges of $87.32 at Whole Foods posted within 2 minutes. One via your physical card, one via Apple Pay. Likely a duplicate post - worth checking with the merchant before the chargeback window closes.
Reconciliation errors are the silent tax on having multiple accounts. A merchant posts via Apple Pay and then again through the underlying card. A refund processes on the merchant's side but the credit never appears on your statement. A check shows as cleared from your checking account but missing from the credit card payment it was meant to cover. You only notice when the balance feels wrong.
For every new transaction the agent looks for siblings within a 48-hour window: same amount, same merchant fingerprint, different account or payment rail. Mismatched transfers (debit in one account without a corresponding credit) get flagged separately. Refunds advertised in transaction memos that don't materialize within 14 days trigger a "did this refund land?" check.
You paid $87.32 at Whole Foods using Apple Pay. The transaction posts twice - once with the merchant name "Whole Foods Market" via your physical card, once as "WHOLE FOODS APPLE PAY" via the card-not-present rail. Both for the same amount, the same minute. The agent sees both as candidates for a duplicate and surfaces them for review.
Free on the Spark tier - no credit card required. Connect your bank read-only via Plaid; the agent starts watching from the first sync.
Try FinNudge free →No credit card · 5 minutes to connectSpending Patrol is amount-based ("that's big for this merchant"). Anomaly Detector is structural ("two charges that probably shouldn't both exist"). They run independently - you can get either or both alerts on the same day.
Sometimes - duplicate posts often signal a stolen-card test charge. But fraud detection is primarily your bank's job. Anomaly Detector is calibrated for benign reconciliation errors that genuinely cost you money.