Scammers never build a page like this. If a party you are dealing with becomes uncomfortable when you ask the questions below, that is the answer.
None of these require a sophisticated criminal. They require a counterparty who does not check.
Shell companies with impressive websites and no verifiable history. The website is the product.
Recycled LOIs, ICPOs and contracts with the letterhead changed — sometimes the original counterparty's name is still in the metadata.
Requests for a fee before any shipment exists: port charges, clearance, allocation, documentation.
A price 8-10% under the published market is not a bargain. It is a hook.
Fake refinery mandates and allocation letters, often with a real company's name and a fake signature.
Inspection reports that no third party will confirm when you call them directly.