In 2003, Telstra sent a letter by facsimile to Crazy John's demanding payment of A$21,283,642.61 it said was for the overpayment of trailing commissions, a percent of customers' phone bills. In the letter, Telstra hinted that, if the demand was not paid for, its contract as a Telstra dealer could be adversely affected. Crazy John's paid the $21 million, and immediately filed suit to demand it be refunded. Crazy John's claimed that Telstra's accounting system, MICA (Mobile Integrated Customer Accounts), used to bill its 8 million subscribers, was not able to provide the information required to produce an accurate bill and, therefore, support their payback demand.