 The Federal Trade Commission said Wednesday it has filed an administrative complaint against Fleetcor Technologies Inc. FLT, -2.19 and its Chief Executive Ronald Clarke, for charging customers hundreds of millions of dollars in mystery fees related to fuel cards. FleetCor, marketing under the Fuelman brand name and through co-branded cards with businesses around the country, falsely told its business customers that they would save money, be protected from unauthorized charges, and have no set-up, transaction, or membership fees. 