New Zealand's High Court has given ANZ customers more time to sign up to a class action against the bank. The dispute stems from allegations that they were overcharged for cheque dishonour fees, unarranged overdraft fees and credit card late payment fees.The "Fair Play on Fees" class action run by local lawyer Andrew Hooker and backed by Slater and Gordon, and Litigation Lending Services was lodged in the Auckland High Court in June. The case is running in tandem with a similar one in Australia.Hooker said the court had ruled, in an interlocutory judgement, that customers not already signed up before the case was filed in June now had until December 13, 2013, to sign up."We are very happy for those ANZ/National Bank customers who came to us wanting to join the campaign after the court documents were lodged," he said, adding over 1,000 clients were in that situation.Hooker said the class action had also been approved to go ahead in its current form, with a proposal from ANZ to break the action into six sub-groups being rejected by the court.The next court hearing is due on November 28, and a date for a trial is expected early next year.Hooker said "Fair Play on Fees" now had 14,700 clients signed up from ANZ/National Bank in its first representative action.ANZ has pledged to vigorously defend the action. Hooker has pledged to launch similar cases against NAB's BNZ, CBA's ASB, Westpac and Kiwibank.