The MTR Corporation will today consider ways to rescue Octopus Cards' credibility and the future of the company's embattled chief, Prudence Chan Bik-wah. The issues will be discussed at a board meeting of the railway operator, largest shareholder in Octopus Holdings - the parent company of Octopus Cards which is embroiled in a row over the sale of card-holders' data to third parties. The proposal will be put to the next meeting of the Octopus Holdings board, to be held some time after tomorrow's announcement of the Privacy Commissioner's findings on the data sales affair. Despite being the largest shareholder, the MTR does not have the final say on whether Chan is removed as chief executive of Octopus Holdings as it has only 49 per cent voting rights on the board. But other shareholders - including Kowloon-Canton Railway Corporation, Kowloon Motor Bus, New World First Bus and Citybus - are unhappy with her recent performance, a person familiar with the situation said. Another person said Chan - accused of misleading the public over the data sales - had also not informed the board fully on what information was sold. Chan first said only personal details of 2.4 million cardholders who joined a reward scheme were passed to its merchant partners so they could provide scheme participants with news on promotions. But later she said private information about those who joined an automatic add-value service and about personalised card holders was also sold. Lawmakers lambasted Chan for having initially denied selling cardholders' data but admitting later at a public hearing that the company had pocketed HK$44 million for sharing the information with six merchant partners between 2006 and 2009. MTR's board of directors - comprising government officials including Secretary for Transport and Housing Eva Cheng and Secretary for Financial Services and Treasury Professor Chan Ka-keung - will look into strengthening supervision of Octopus Cards management. Meanwhile, it is alleged that Octopus Cards probably made millions of dollars using cardholders' information in other ways. Unionist lawmaker Lee Cheuk-yan said a former employee of marketing research firm Cimigo told him that the card issuer had helped Cimigo search for target groups. 'If Cimigo wanted to study customers of fast-food chains, Octopus Cards would locate the right kind of people from its database and ask them to answer a questionnaire for Cimigo.' Lee said the employee - who wished to remain anonymous - said Octopus Cards earned HK$10 for every questionnaire sent out and that he alone had processed more than a million questionnaires during his two years at Cimigo. 'It is true they didn't sell data in this case, but it is frightening to know [Octopus Cards] holds information concerning our life patterns, what movies we like, where we eat, and this data is always available for sale,' Lee said. The employee complained to the privacy commission but was told the situation did not seem to violate any privacy law. An Octopus spokesman said the company had provided the last name, phone number and Octopus card number of about 30,000 card-holders to Cimigo for a telephone survey. It had also provided Octopus card numbers of 620,000 cardholders to Cimigo for an online survey.