The Australian Financial Complaints Authority has told banks and other financial institutions that they need to do more to deal with the large number of unauthorised transactions, which were a significant cause of complaints to the ombudsman over the past six months.AFCA  has released a report on its first six months of operations, when it received 35,000 complaints - more than 35 per cent more than the combined average of its predecessor schemes over the same time period. It expects to receive 80,000 complaints in its first year.It has resolved 60 per cent of these complaints, as well 9,000 complaints that were still being worked on by the Financial Ombudsman Service and the Credit and Investment Ombudsman.Consumers and small businesses received A$83 million in settlements.74 per cent of complaints were resolved by agreement or in favour of the complainant. However, of the 241 complaints that went all the way to a formal binding determination, 72 per cent of determinations were in favour of the financial firm.In terms of products, credit cards accounted for the largest number of complaints, followed by home loans, personal loans, comprehensive motor vehicle insurance and personal transaction accounts.In terms of the issues raised, credit reporting was number one. People complained about their consumer credit profile.Other issues included unauthorised transactions, delays in insurance claims handling, incorrect fees and costs and denial of claims."The high number of unauthorised transaction complaints shows that financial firms need to do more to ensure that they have appropriate systems in place to detect fraudulent transactions," the report says.Banks were the companies most complained about, attracting about one-third of all complaints, followed by general insurers, credit providers and debt collectors.87.7 per cent of AFCA members had no complaint made against them during the six months.Complaints about investment and advice made up a small proportion of the total - about 5 per cent. There was a big increase in complaints about foreign exchange trading accounts, with consumers complaining about the difficulty of withdrawing funds, misleading conduct, pricing errors and discretionary trading.Superannuation complaints made up 9 per cent of the total. The biggest issue related to claims of incorrect fees and costs. The other big issue was delays in claims handling.