That something could have been taken straight out of the playbook of either Cyprus, or Greece, or the USSR "evil empire", or all three.

This is how the WSJ explained it:

The U.S. Justice Department's criminal head said banks may need to go beyond filing suspicious activity reports when they encounter a risky customer.

 "The vast majority of financial institutions file suspicious activity reports when they suspect that an account is connected to nefarious activity," said assistant attorney general Leslie Caldwell in a Monday speech, according to prepared remarks.