The Privacy Commission will launch an investigation after clients of toll service provider Autotoll filed a complaint claiming the firm had transferred their personal data to an insurer, a legislator said yesterday. Lawmaker Wong Kwok-hing and a representative for more than 30 Autotoll clients yesterday met Privacy Commissioner Allan Chiang Yam-wang to lodge a complaint. The group of complainants approached the lawmaker for help this month after they received a letter jointly sent from Autotoll and insurance company Liberty International. The letter, which contains clients' names, addresses, car plate numbers and Autotoll code numbers, said that Autotoll's subsidiary, Autotoll Insurance Agent, was offering them a car insurance deal. Wong said: 'We suspect that Autotoll has transferred their clients' personal data to other companies, as its clients have received calls and letters from an insurance agent promoting car insurance.' He said Autotoll had 240,000 customers - 130,000 individual clients and 110,000 company clients. Its electronic toll service could be used not only at road tunnels, but also car parks, petrol stations as well as some highways in Guangdong province. 'We worry that clients' personal data can be leaked to third parties outside Hong Kong as the company's Autotoll-Unitoll Card can be used across the border,' Wong said. Wong said the commissioner had accepted the complaint and promised to launch an investigation. He also quoted Chiang as saying that the commission aimed to finish the Octopus investigation in the middle of next month. A spokeswoman for Autotoll said they did not have enough information about the complaint, but added that no clients' personal data would be transferred to other parties when the Autotoll-Unitoll Card is used across the border.