Five money-laundering patterns hiding in ordinary ledgers

Anti-money-laundering work is usually framed around banks screening their customers. But money that needs to be cleaned has to pass through somebody's books, and the same patterns banks look for often leave traces in a company's general ledger, bank statements and vendor master.

Regulators are also raising the bar. The UAE's Central Bank updated its AML guidance in April 2026, pushing institutions toward continuous, technology-driven monitoring, and the US Treasury's FinCEN proposed an overhaul of how AML programmes are structured. Expect diligence teams and lenders to ask harder questions of the companies they back.

Five patterns worth testing

• Structuring: payments repeatedly split to sit just below a reporting or approval threshold.
• Round-tripping: money that leaves for a counterparty and comes back, often dressed up as revenue or a loan.
• Circular flows between related parties: funds moving A to B to C and back to A, with little business reason.
• Rapid pass-through: large receipts that leave the account again within days, leaving almost no balance behind.
• Counterparties on sanctions or politically exposed person lists, or vendors with no tax registration who are paid unusually fast.

A flag is a question, not an accusation

None of these patterns proves wrongdoing on its own. Group treasuries move money between entities for good reasons, and some businesses genuinely deal in round amounts. What matters is that each flag is traced to the exact transactions behind it, so a reviewer can ask the right question and a client can answer it with documents.

That is the standard we hold ourselves to: every AML flag in a Finaley report links back to the ledger lines and bank entries that raised it.