End to rip-off debit and credit card charges Andy Millmore, a partner at law firm Harbottle & Lewis, said retailers should not be complacent about these changes. They could face legal action if found to be charging more than they are charged by banks. "The challenge will be how customers are supposed to know what is and what is not the legitimate processing cost," he said. In February, the Advertising Standards Agency ruled against four theatre ticket providers for quoting misleading ticket prices on their websites. Theatres must now include compulsory fees and charges in the advertised price.