We first wrote about CEO impersonation fraud back in 2015. At around the same time, Peebles Media Group was a victim of such fraud. A member of their credit control team received emails purporting to be from the managing director and ultimately £193,250 was transferred to the fraudsters in a series of transactions.

http://www.mondaq.com/uk/x/880822/employee+rights+labour+relations/CEO+Impersonation+Fraud+Can+An+Employee+Be+Liable+For+Their+Negligent+Actions