One Red Flag Is Bad Luck. Two Means Walk Away.

Every legitimate fuel deal leaves a paper trail that checks out. Every fraudulent one has at least one document that doesn’t.

The fuel supplier vetting checklist that catches scams before you wire a single dollar.

Here’s a scenario that plays out somewhere in fuel trading almost every week. A buyer gets an offer that looks fantastic, EN590 diesel, competitive volume, priced a little under market, from a “mandate holder” who says they represent a refinery. The paperwork looks clean. The English is professional. There’s a logo, a letterhead, even a scanned signature. And then, a few emails in, comes the ask: a “tank fee,” an “activation fee,” something small enough to not trigger alarm bells, needed before the real documents get released.

That’s the moment. Not the wire transfer, the ask. And it’s a pattern that shows up so often in physical fuel trading that compliance teams have a name for it: advance-fee fraud, and in the EN590 diesel market specifically, it’s described as one of the most pervasive scam types in physical commodity trade.

This isn’t a fringe problem, either. Trade fraud enforcement is intensifying broadly. The U.S. Department of Justice’s Trade Fraud Task Force passed $1 billion in recoveries and charged losses within roughly a year of standing up, and civil trade-fraud recoveries in the first half of 2026 alone already exceeded every prior full year combined.

So, the real question isn’t whether fraud exists in this market. It obviously does. The real question is: do you have a checklist that catches it before your money moves? Here’s one, built from what compliance desks and anti-fraud specialists actually check.

Quick answer: Verify the company against the national registry, confirm who you’re actually dealing with, verify the product’s storage agreement and tank numbers, check certificates and inspection reports directly with the issuers, and confirm the payment structure follows ICPO and LOI steps into a Letter of Credit instead of an upfront wire transfer. One red flag might be an oversight. Two or more in the same deal is treated as a near-certain fraud pattern, and that’s when you walk away.

1. Verify the Company Actually Exists: Not Just the Paperwork

Start here, before anything else. A trading company that’s been registered for less than twelve months and is offering EN590 volumes above 50,000 metric tons is, on its own, considered a major red flag by fraud-prevention specialists.

• Cross-check the company’s registration certificate, trading license, and country of incorporation directly against the relevant national company registry, not against a document the seller emailed you.
• If the company can’t be found in the applicable registry at all, that’s not a paperwork gap. Walk away.
• For groups above roughly 25 percent ownership, ask who the beneficial owners actually are, and check names against sanctions and watchlists (OFAC, EU, UN, FATF, FinCEN).
• Ask for trade references and check them. A real supplier with a real track record will have completed deals someone else can confirm.

2. Find out who you’re actually talking to

Fuel deals often move through a stack of self-described “mandates,” “facilitators,” and intermediaries standing between you and a seller who never actually appears. Fraud specialists call this a mandate chain, and describe it plainly: this layered structure almost always hides a fraud.

• If the seller can’t or won’t connect you directly to the actual product owner, the refinery, the terminal, or a verifiable mandate holder, treat that as a warning sign, not a formality.
• If a claimed mandate holder can’t produce the original allocation letter, or a refinery contact who can confirm the mandate exists, the mandate itself may not be real.
• Watch for impersonation of executives at recognizable major oil companies. A matching LinkedIn profile is not verification, it’s a prop.
• A genuine seller doesn’t chase you. Real refineries and approved sellers are reached through established trading desks and compliance channels. They don’t need to hunt for buyers.

3. Verify the Product Actually Exists

Fuel doesn’t float. If someone is selling it, it’s sitting in a specific tank at a specific terminal, under a specific storage agreement, and that’s all verifiable.

• Ask for the storage agreement and the terminal and tank numbers, then verify them directly with the terminal yourself. One email to the terminal operator can expose a fake supplier in minutes.
• Be skeptical of any version of “storage is on the way,” “we’ll send it once you’re ready to pay,” or “the seller keeps that confidential.” A real seller with real product in storage has nothing to hide about where it sits.
• A genuine seller will agree to let an independent inspector visit the terminal before you sign anything binding. Refusing, or endlessly delaying, that visit is treated as a near-definitive scam signal.

4. Verify the Paperwork: Line By Line, Not By Logo

This is the step buyers skip most often, because the documents look official. Looking official and being verifiable are two different things.

Certifications (ISO and similar)

• Don’t verify a certificate on the site of whoever handed it to you. Find the actual issuing certification body’s own public directory and look up the certificate by its unique code.
• Confirm the certification body itself is accredited by a recognized national accreditation body, and that the accreditation actually covers the scope claimed.
• Check that the scope, dates, and covered activity or site match what’s actually being claimed. A valid certificate only backs exactly what its scope says, nothing more.

Independent inspection reports (SGS or equivalent)

• A genuine inspection report has specific, checkable identifiers: terminal name, tank number, sample point, inspector name, and a traceable certificate number. Any one of these missing is a fraud flag on its own.
• Authenticate the certificate number directly through the inspection company’s own verification system, and confirm the number hasn’t been recycled from an older, unrelated report.
• Reconcile the report’s date and time against the tank farm’s own log. A quality report that doesn’t line up with when the tank was actually dipped is a document that was written, not measured.

5. Verify the Payment Structure: This Is Where Most Scams Collapse Or Succeed

If everything above checks out but the payment structure is wrong, you can still lose everything. This is the step that separates a real deal from a well-dressed one.

• A legitimate transaction normally moves through an ICPO (Irrevocable Corporate Purchase Order) and an LOI (Letter of Intent) before progressing into a Letter of Credit or Standby Letter of Credit structure. A seller skipping straight to a payment demand is skipping the part of the process that protects you.
• Never wire funds via SWIFT T/T before an independent inspector has verified the product. A seller insisting on upfront T/T instead of an LC structure is, per fraud-prevention specialists, not running a legitimate transaction.
• Treat any request for “Proof of Funds” as a precondition to even discussing product as a warning sign in itself. It’s a recognized pattern in advance-fee commodity fraud, not a normal opening move.
• Offers to “lease” or “monetize” a Standby Letter of Credit or Bank Guarantee are a classic instrument scam. That structure essentially never survives contact with an actual bank.

6. Watch the Behavior, Not Just the Paperwork

Some of the clearest signals have nothing to do with a document at all.

• Pricing that’s 10 to 20 percent below the current market rate, with no clear explanation of how, is treated as a red flag on its own. Legitimate suppliers can’t consistently sell below market and stay in business.
• Watch for “roll-and-extend” patterns: delivery dates that keep slipping, each time with a plausible-sounding reason (port congestion, weather, “documentation issues”), while fees keep getting requested along the way.
• Pressure to decide immediately, evasive answers to specific technical questions, and reluctance to get on a call or video are all, individually, minor. Together, they’re a pattern.

The Rule that Actually Matters: One flag, Two flags

Fraud-prevention specialists who see this pattern repeatedly put it simply: any single red flag on this list warrants heightened scrutiny. It might be an oversight, a language barrier, or a disorganized but legitimate counterparty. More than two red flags showing up in the same transaction, though, is described as a near-certain fraud pattern. That’s the practical rule. You don’t need to prove fraud to walk away. You just need two flags in the same deal.

Where This Checklist Gets Shorter

Notice how many of the items above exist specifically because of the layers between a buyer and the actual product: the mandate chain nobody can verify, the “facilitator” who won’t connect you to the refinery, the intermediary fee that shows up before anyone has proven anything is real. Those risks are structural to broker-chain trading. They don’t go away because a broker is honest, because the risk is baked into how many hands the deal passes through before it reaches you.

Petrolodex trades principal-to-principal, across South America, EMEA, and Asia-Pacific. When you deal with us, you’re dealing with the party that actually holds and moves the product, not a reseller, not a fourth-tier mandate holder, not a chain you have to untangle before you can trust it. That doesn’t make every checklist item above irrelevant. You should still verify our registration, our storage, and our documentation, and we expect you to. But it does mean there’s one point of accountability instead of a chain of them, and no middleman fee quietly riding along on top of your price.

The Bottom Line

Nobody sends you this checklist before you sign. That’s exactly why it’s worth keeping. Verify the company. Verify who you’re actually talking to. Verify the product is really sitting somewhere. Verify the certificates and inspection reports against the people who actually issued them. Verify the payment structure protects you before money moves. And if two or more of these come back wrong at the same time, that’s not a coincidence. It’s your answer.

Talk to us: Talk to Petrolodex about direct-supply fuel and chemical contracts. Principal-to-principal, no broker layer, one point of accountability. Fewer parties to verify, because there are fewer parties, period.

Frequently Asked Questions

What is an advance-fee fuel scam?

An advance-fee fuel scam is when a seller or “mandate holder” asks for an upfront payment, often called a tank fee, activation fee, or facilitation fee, before releasing real documentation or product access. The product typically never materializes after the fee is paid. It is one of the most common fraud patterns in physical fuel trading.

How do I verify a fuel supplier’s ISO certificate is real?

Look up the certificate directly on the issuing certification body’s own public verification directory using its unique certificate code, never rely on a copy sent by an intermediary. Then confirm the certification body itself is accredited by a recognized national accreditation body, and check that the scope, sites, and dates on the certificate match what is actually being claimed.

What should I check on an SGS or independent inspection report?

Confirm the report includes a terminal name, tank number, sample point, inspector name, and a traceable certificate number, then authenticate that certificate number directly through the inspection company’s own system to confirm it has not been reused. Also reconcile the report’s date and time against the terminal’s own tank farm log.

Is it normal for a fuel seller to ask for proof of funds before discussing product?

No. Fraud-prevention specialists treat a Proof of Funds request made before any product verification as a warning sign associated with advance-fee commodity fraud, not a standard opening step in a legitimate deal.

What is the difference between an ICPO, an LOI, and a Letter of Credit?

An ICPO (Irrevocable Corporate Purchase Order) and an LOI (Letter of Intent) are the buyer’s and seller’s initial statements of intent to transact, exchanged before money moves. A Letter of Credit or Standby Letter of Credit is the actual payment instrument that follows, structured so funds move only against verified documents or product, not before independent inspection.

How many red flags mean I should walk away from a fuel deal?

A single red flag may simply reflect a disorganized but legitimate counterparty and warrants closer scrutiny rather than an automatic exit. More than two red flags appearing in the same transaction, however, is considered a near-certain fraud pattern by fraud-prevention specialists. At that point, walking away is the correct call.