When Danske Bank was placed under formal investigation in France again over suspected money laundering at its Estonian branch, EU lawmakers said tougher action needs to be taken to stop the dirty flow of money through Europe’s banks.

On 7 February, Danske Bank announced that—for a second time—a French judge has decided the bank should be formally investigated for suspected money-laundering transactions worth €21.6 million (U.S. $24.4 million) committed between 2007 and 2014.

Neil Hodge is a freelance business journalist and photographer based in Nottingham, United Kingdom. He writes on insurance and risk management, corporate governance, internal audit, compliance, and legal...