Case File 028: Vendor Setup Scams — When “Updated ACH Details” Aren’t What They Seem

Filed under: Vendor Fraud & Payment Diversions

A vendor email arrived: “Please update our bank info.” Detective Debit hesitated. Fraudsters love posing as vendors, slipping in new ACH details to reroute payments. One careless update, and your cash vanishes into thin air.

Figgy’s whiskers twitched — the routing number smelled wrong.

Detective Debit investigates bookkeeping mysteries and uncovers hidden financial clues. She solves cases involving vague accounts, misclassified expenses, and audit risks.

The Clues

  • Email requests for updated bank details without verification

  • Routing numbers inconsistent with vendor’s location

  • Payments suddenly failing or redirected

  • Vendor account balances not matching invoices

The Twist

Vendor setup scams exploit trust. One careless update, and your cash vanishes into thin air.

Detective Debit’s fix: Verify all bank changes with a phone call to a known contact, require dual approval for ACH updates, and document every change.

Figgy flicked her tail:

“Trust but verify — every time.”

Cartoon tornado swirling downward.
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The Takeaway

Vendor fraud is preventable with strong controls. Verification and documentation protect your payments from diversion.

Need Backup?

Declutter Your Books LLC helps you secure vendor records, verify ACH details, and keep payments flowing to the right accounts.

Figgy flicked her whiskers: ‘Unverified emails and mismatched numbers? That’s fraud dressed up as business.

Headshot of Detective Debit, the fictional forensic bookkeeper who investigates financial mysteries and uncovers misclassified expenses with clarity and grit.

Fraudsters count on speed and trust. Strong controls, deliberate verification, and documented changes keep your payments safe — and your business one step ahead of the scam.

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Case File 029: Bank Reconciliation Red Flags

When the statement says one thing and the books say another, it’s more than a mismatch — it’s a red flag. February kicks off our new series where Detective Debit digs into the hidden traps inside reconciliations.