Wilful Blindness

The idea is that a person cannot escape liability by choosing not to look. If someone strongly suspects a payment is criminal and avoids asking questions, so as to keep deniability, the law in many places treats them as having known. It sits between knowing and negligence. A careless person fails to see what a careful one would have seen; a wilfully blind one sees the warning and chooses to look away. In AML cases, it is raised against bankers who ignore red flags, professionals who process transactions for a client they suspect, and managers who tell staff not to ask. Tests differ by country, but a conscious decision to avoid confirmation is usually central. Firms that ignore plain warning signs cannot later defend themselves by pointing to an absence of proof.

A relationship manager notices that a customer's cash deposits are far larger than the business could earn. A colleague suggests asking about the source, but the manager says it is better not to know and processes the deposits as usual. After the customer is prosecuted, the regulator treats the manager's choice not to ask as wilful blindness, not as an honest oversight.