The Great Salad Oil Swindle

A Deep Dive Into One of Wall Street's Most Audacious Frauds

The Great Salad Oil Swindle happened in 1963, and it is one of those cases that makes you wonder how anyone ever approved a loan based on warehouse receipts without going to see the actual collateral. Associated Container Transportation (ACT) and its president Rogeren Van der Bergh claimed to be storing millions of gallons of salad oil in commercial tank farms in New Jersey. The problem was the tanks were mostly filled with sand, then covered with a thin layer of salad oil to pass inspections. ACT had borrowed hundreds of millions against these nonexistent or greatly inflated inventories. The scheme unraveled when Chase Manhattan Bank, which had been a major lender to ACT, tried to seize the collateral after the company defaulted. When bank officials went to inspect the tanks, they found not nearly enough oil to back the loans. Several banks that had accepted ACT's warehouse receipts as collateral ended up writing off huge losses. It turned out some of those receipts were fraudulent, and the liquid assets they supposedly represented simply did not exist in the quantities claimed.

How The Great Salad Oil Swindle Actually Worked

Van der Bergh's operation was simpler than you might think. He ran a commodities trading business that dealt primarily in soybean and other vegetable oils. The fraud depended on three things: shell companies, modified warehouse receipts, and the willingness of banks to lend far more than prudent due diligence would allow. Here is the mechanics of it. ACT would commission independent surveyors to count the oil in tanks. A skilled operator could do something called "steaming" to the tanks - pumping hot water or steam underneath the oil layer to mix the contents, creating the appearance of a full tank even when it was mostly empty or filled with sand below. Then the surveyor would take a sample from the top, confirm it was oil, and issue a receipt for the total volume. The receipts were sometimes altered or duplicated and then presented to multiple lenders as proof of collateral. That is called double-pledging, and it is one of the oldest tricks in commodity finance. I spent time in the mid-noughties working on a project where we were trying to audit a commodities lending book that had similar red flags. Warehouse receipts from a small operator in the Gulf Coast region came in through a third-party inspection firm that had a history of turning a blind eye to discrepancies. The amounts they were certifying didn't match vessel manifests or independent terminal records. When I pushed the relationship manager to slow down on new draws until we resolved the gap, the response was predictable frustration. But digging into it, I found the exact same pattern that Van der Bergh used decades earlier. The tank receipts said one thing, the actual fill levels at the terminal said something else entirely. We called in an independent engineer with a radar gauge system, which gave us real-time inventory data without relying on the inspection company. That workaround cut through about six weeks of back-and-forth disputes with the borrower and the inspectors. It also revealed that the collateral coverage ratio was roughly forty percent of what the paperwork claimed, which meant we were substantially underwater on several positions.

The structural weakness in the whole arrangement was that no single entity was independently verifying the actual physical inventory against the paper trail. Warehouse receipts are supposed to be negotiable instruments that represent title to goods stored in a facility. In practice, the system relied entirely on the honesty of the warehouse operator and the inspection company. When both of those parties were complicit, or simply careless, there was almost nothing standing between the borrower and unlimited leverage.

Why Banks Missed the Warning Signs

Banks lent against these receipts because the paperwork looked legitimate on its face. Warehouse receipts issued by certified public warehouses are standard collateral in commodity lending. The risk comes from the gap between the paper and the physical reality. Banks generally do not have the incentive or expertise to independently verify tank farm inventories for every borrower. They rely on third-party reports, and those reports can be manufactured or manipulated. In the ACT case, several major financial institutions extended credit based on receipts that turned out to be invalid. The total exposure across all lenders was estimated at around two hundred million dollars in 1963 dollars, which is roughly two billion adjusted for inflation. Some lenders recovered part of their losses through legal proceedings, but a significant portion was written off entirely. The scandal led to sweeping changes in how commodity-backed lending is monitored. Banks started requiring more frequent and independent physical inspections. The use of third-party inspection firms became more heavily regulated, and lenders began cross-referencing receipts against terminal operator records rather than taking them at face value. The practical takeaway here is that no amount of paper documentation can substitute for physical verification when you are lending against stored commodities. The Great Salad Oil Swindle is essentially the textbook case for why that principle matters. It is still relevant today. You will find the same structural vulnerabilities in any market where warehouse receipts are used as collateral and independent verification is treated as optional rather than mandatory. The instruments are different now, but the core problem has not changed.