Four more people have been charged for bribery and conducting unauthorised checks on the personal data of customers of banks and two debt-collection companies.

Lo Po-shun, 40, director of Honesty Corporate Management and partner of Shun Tat Debt Collection Service Company; Hung Tsz-yin, 41, Honesty's employee; Au Yeung Yuk-lin, 28, former bank clerk; and her brother Au Yeung Chi-fai, 38, will appear in Kowloon City Magistracy Friday.

The bribery charge alleges the Au Yeungs conspired together for the younger sibling to accept advantages from Hung. The alleged advantages were calculated at $10 to $20 per set of customer data provided by Au Yeung Yuk-lin to Hung.

The four defendants face three counts of conspiring together and with others to access computers belonging to two banks to dishonestly gain for themselves or another.

Hung alone faces three similar offences of conspiring with Lo and others to obtain access to computers belonging to three banks for the same reason.

Lo faces a count of unlawfully inciting a person to obtain access to a computer belonging to a bank for the same reason, while Hung faces a similar offence involving a computer at another bank.

The defendants allegedly conspired to conduct unauthorised checks on bank customer data for Honesty and Shun Tat to assist their debt collecting business.

Another nine people have also been charged in the case.