Register adjustments — voids, refunds, no-sale drawer opens, price overrides, and employee discounts — are the single most important data source for detecting employee theft at the point of sale. Every legitimate adjustment has a business reason: a customer changed their mind (void), returned a defective product (refund), or needed change for a larger bill (no-sale). But every type of adjustment is also used to steal.
Data published in QSR Magazine documented a case study where systematic monitoring of register adjustments at a major QSR chain produced average savings of $14,000 per store per year. That's not theoretical — it's measured savings from comparing stores with monitoring against stores without.
For a 5-location QSR operator, that's $70,000/year. For a 10-location operator, $140,000/year. These numbers make register monitoring one of the highest-ROI operational investments available to franchise operators.
What Are Register Adjustments?
Register adjustments are any POS transaction that modifies the normal sale-to-payment flow. They include:
- Voids: Cancellation of an item or entire transaction after it's been rung up. Legitimate reason: customer changed their mind. Theft use: ring up a sale, collect cash, void the transaction, pocket the cash.
- Refunds: Return of money to a customer for a previous purchase. Legitimate reason: defective product, customer dissatisfaction. Theft use: process a refund for a return that never happened and pocket the cash.
- No-sale drawer opens: Opening the cash drawer without processing a transaction. Legitimate reason: making change for a customer. Theft use: accessing the drawer to remove cash.
- Price overrides: Changing the price of an item during a transaction. Legitimate reason: price match, manager-approved discount. Theft use: ringing a friend's $20 order at $5.
- Employee discounts: Applying employee discount to a transaction. Legitimate reason: employee purchasing their meal. Theft use: applying the discount to friends' and family's purchases.
Why Monitoring Works
Deterrence
When employees know that every void, refund, and no-sale is reviewed — and that video footage is matched to each event — the temptation to steal drops dramatically. Most employee theft is opportunistic: it happens because the employee believes they won't get caught. Monitoring removes that belief.
Detection
Patterns emerge that individual events don't reveal. One void per shift is normal. Twelve voids per shift is a red flag. A cashier who processes 3x more refunds than any other cashier on the same shift is either having terrible luck with customers or committing refund fraud. Pattern analysis turns noise into signal.
Evidence
When monitoring identifies a problem, the evidence already exists: POS transaction record + timestamp + video footage of the event. This evidence package supports termination decisions, deters legal challenges, and (in severe cases) supports prosecution.
What to Monitor and What to Look For
Voids
- Volume: How many voids per shift compared to other cashiers? More than 2x the average is a flag.
- Timing: Voids that occur immediately after a cash payment (within 60 seconds) are the highest risk — the cashier may be collecting cash and then voiding the sale.
- Video correlation: Does the video show a customer present during the void? A void with no customer visible = high probability of theft.
Refunds
- Volume: Refunds should be rare in QSR. More than 1–2 per shift is unusual.
- Cash refunds: Cash refunds on credit card transactions are a classic theft indicator — the original payment goes to the card, the "refund" comes out as cash.
- Manager authorization: Are refunds being processed without required manager approval?
No-Sale Drawer Opens
- Frequency: More than 3–5 per shift (depending on operation type) is suspicious.
- Timing: No-sale drawer opens during low-traffic periods (late night, early morning) are higher risk.
- Video correlation: Is a customer present? Is the cashier making change, or accessing the drawer for no visible reason?
Price Overrides and Employee Discounts
- Authorization: Are overrides happening without manager approval?
- Pattern: Same cashier applying employee discounts multiple times per shift = possible sweethearting.
- Dollar value: Small overrides ($1–$2) are less suspicious than large ones ($10+).
How to Implement Register Monitoring
Level 1: Exception Reports (DIY)
Most POS systems can generate exception reports showing all voids, refunds, no-sales, and overrides by employee, by shift. If you're not pulling these reports daily, start tomorrow. Review the top 10 exceptions each day — it takes 15 minutes and immediately reveals patterns.
Level 2: Exception Reports + Video Review (DIY + Time)
For each flagged exception, review the corresponding camera footage. This is more time-consuming (30–60 minutes/day) but dramatically more effective because it adds visual context to the POS data.
Level 3: Managed Daily POS + Video Audit (DohShield)
A managed service like DohShield provides trained reviewers who pull your POS exception data, correlate it with video footage, and produce daily reports with evidence packages. You receive a summary: "3 flagged events today — 2 voids with no customer present on Camera 2, 1 no-sale drawer open during zero-traffic period on Camera 1." Each finding includes timestamped video and the POS transaction detail.
Documented Results
- $14,000/store/year average savings from the QSR Magazine case study
- 487% average ROI for DohShield clients across all verticals
- 125,000+ incidents on record in the DohShield database — employee theft, vendor fraud, policy violations, and operational non-compliance
- 30-day payback period: Most operators recoup the cost of monitoring within the first month through identified theft and process improvements
The $14,000/year figure represents the average across all monitored stores. Some stores — particularly those with existing theft problems — see significantly higher recoveries in the first 6 months as systemic theft is identified and stopped.