How to Catch Supplier Invoice Fraud in Your Venue
Supplier invoice fraud costs Australian hospitality venues an average of $15,000–$40,000 per year in undetected overcharges, duplicate line items, and phantom deliveries. Most owners never catch it because they're on the floor, not in the office. The good news: you don't need an accountant to spot it. You need a system.
This guide walks you through the real tactics that work—and the one counter-intuitive move most venues miss entirely.
Why Hospitality Invoices Are a Fraud Target
Hospitality suppliers know the vulnerability: venues are chaotic. Orders fly in via phone, text, email, and supplier reps. Invoices land in a pile. Owners are managing staff, covers, and complaints. No one has time to cross-check every Bidvest or PFD delivery against what actually arrived.
That's the gap suppliers—and dishonest operators—exploit.
A Melbourne cafe owner we know discovered her Countrywide rep had been invoicing her for 20 kg of coffee beans twice a week for six months. She'd only ordered once. Cost: $8,400 before she noticed. A Sydney bar found duplicate charges for spirits on the same invoice—same line item, same SKU, listed twice. A Brisbane bakery was billed for premium flour at standard prices, then upgraded mid-invoice without her knowledge.
None of these were system errors. They were deliberate.
The Five Red Flags Every Owner Should Know
1. Invoices That Don't Match Your Orders
This is the easiest catch. Every invoice should reference a purchase order (PO) number or order confirmation. If your supplier's invoice lists items you didn't order—or quantities that don't match what you requested—flag it immediately.
Action: Keep a simple order log. Write down date, supplier, items, quantities, and expected delivery. Spend 90 seconds matching it to the invoice. If it doesn't align, call the supplier before you pay.
2. Duplicate Line Items on the Same Invoice
Look for the same product listed twice on a single invoice—same SKU, same unit price, same date. This happens more often than you'd think, especially with multi-page invoices or when suppliers use automated systems with manual overrides.
Action: Scan invoices for repeated SKUs. Use Ctrl+F (or Cmd+F on Mac) to search for the product code. If it appears twice, query it.
3. Vague or Missing Descriptions
Some suppliers bill for "produce" or "goods" without specifying what. This is a red flag. Legitimate invoices itemise everything: "Diced Onions 2kg", "Chicken Breast Fillet 5kg", not "vegetables x5".
Action: Require itemised invoices. If a supplier won't provide them, that's a problem. Make it a condition of your account.
4. Price Changes Mid-Invoice
A supplier invoices you for 10 kg of coffee at $18/kg for the first 5 kg, then $22/kg for the remaining 5 kg—without a note explaining the price jump. This often happens when suppliers "upgrade" your product mid-order and don't notify you.
Action: Ask suppliers to flag any price changes or product substitutions in writing before delivery. Don't accept surprises on the invoice.
5. Invoices That Don't Match Delivery Dockets
Your supplier's driver hands over a docket listing what was delivered. Your invoice should match that docket exactly. If the invoice says 50 kg of potatoes but the docket says 40 kg, you've spotted an error—or fraud.
Action: Have someone (even a junior staff member for 5 minutes) sign off on delivery dockets. Keep them. Compare to invoices before payment.
The Counter-Intuitive Tactic Most Venues Miss
Here's the move: Call your supplier and ask them to send you last month's invoices again—without warning.
Then compare the two sets side by side.
If the invoices are identical (same items, same quantities, same prices), that's suspicious. Hospitality demand varies week to week. Your coffee order shouldn't be exactly the same every single week. If it is, your supplier may be using a template invoice rather than billing based on actual delivery.
This catches lazy billing, phantom deliveries, and suppliers who assume you won't check.
One Perth bar owner did this and discovered she'd been invoiced for the same standing order of spirits for 12 weeks—but she'd only received 8 deliveries. The supplier's system had auto-billed her without confirming delivery.
Action: Once a quarter, pull two random invoices from the same supplier and compare them. If they're too similar, investigate.
Seasonal and Public Holiday Invoice Traps
Australian hospitality has seasonal peaks: Melbourne Cup, ANZAC Day, Christmas, school holidays. Suppliers know venues order differently during these periods—and they know you're busier than ever.
Christmas and New Year
Suppliers often increase minimum orders or add "holiday surcharges" during peak season. Some don't disclose this upfront. Check your invoices in December closely—are you paying more per unit than in November? If so, ask why.
ANZAC Day and Melbourne Cup
These events drive huge orders. Suppliers may invoice for items before confirming they're in stock, or bill for "reserved" stock that never arrives. Verify delivery before you pay.
Public Holiday Penalty Rates
Some suppliers add public holiday surcharges to invoices without itemising them. This is legitimate, but it should be clear. If you see a 15% uplift on Christmas Day invoices, ask your supplier to break it down.
The Spreadsheet System That Works
You don't need fancy software to start. A simple spreadsheet catches most fraud.
Create three columns:
- Order Date — When you ordered
- Expected Delivery — When it should arrive
- Invoice Amount — What you were billed
Add a fourth column: Notes. Use it to flag anything unusual.
Every week, spend 10 minutes filling this in. Over a month, patterns emerge. If one supplier's invoices are always higher on Mondays, or if you're being billed for items you didn't order, you'll spot it.
This simple system has caught thousands of dollars in overcharges for venues across Sydney, Melbourne, Brisbane, and Perth.
Where Calso Fits In
Calso's AI invoice audit catches the overcharges, duplicates, and phantom line items that slip through manual checks. It flags price anomalies, matches invoices to orders automatically, and alerts you to vague descriptions or missing itemisation—before you approve payment. For venues juggling dozens of suppliers (Bidvest, PFD, Countrywide, and others), this automation saves time and money. It's the spreadsheet system on steroids.
Want Early Access?
If you're managing invoices manually and want to automate the catch, Calso is invite-only for founding venues. Join the waitlist at calso.com.au/join for priority access. Limited spots in your city—and your competitors are watching.