Liong Yan Sin, Dinath Silvamany Muthaliyar, Ang Kok How (Prohibition Order) - MAS Issues Prohibition Orders against 3 Individuals for Unauthorised Access to Bank Customer Info

Singapore, 26 August 2025… The Monetary Authority of Singapore (MAS) has issued Prohibition Orders (PO) against Mr Liong Yan Sin, Mr Dinath Silvamany Muthaliyar, and Mr Ang Kok How under the Financial Services and Markets Act 2022 (FSMA), for unauthorised access to customer information. The three persons and the durations of the Prohibition Orders issued against them are as follows:

2. Mr Liong was a former collections officer with DBS Bank. In his role, he discussed outstanding payments and payment plans with bank customers. In order to perform his job, he was given access to DBS' Customer Information System.

3. During the course of his employment, Liong made unauthorised searches on DBS' Customer Information System. He did so out of curiosity about customers whose names he had chanced upon online, and to check the personal details belonging to his friends or relatives.

4. In addition to conducting searches of his own, Mr Liong also conducted unauthorised searches on behalf of Mr Muthaliyar and Mr Ang. Mr Muthaliyar, a former colleague of Mr Liong's, had asked Mr Liong to find out the salary details of Mr Muthaliyar's colleagues at his new workplace. Separately, Mr Ang, a friend of Mr Liong's, asked for help to retrieve the contact details of a mutual contact.

5. On 21 November 2022, Mr Liong was convicted of a total of 16 chargesUnder the Computer Misuse and Cybersecurity Act, the Computer Misuse Act and the Banking Actwith 42 charges taken into consideration for the purpose of sentencing. Mr Liong was sentenced to 16 weeks' imprisonment. On 14 September 2023, Mr Muthaliyar was convicted of 8 chargesUnder the Computer Misuse and Cybersecurity Act, the Computer Misuse Act and the Banking Act and sentenced to 5 weeks' imprisonment. 14 other charges were taken into consideration for the purpose of Mr Muthaliyar's sentencing. Mr Ang was sentenced to 2 weeks' imprisonment on 19 May 2023 for 1 chargeUnder the Computer Misuse Act with 1 other charge taken into consideration.

6. In view of their offences, MAS is satisfied that Mr Liong, Mr Muthaliyar and Mr Ang are not fit and proper persons, in accordance with the Guidelines on Fit and Proper Criteria under section 7 of the FSMA.

7. Under the terms of the POs, which took effect on 26 August 2025, Mr Liong, Mr Muthaliyar and Mr Ang are prohibited from carrying on any activity or business, or providing any service, the carrying on or provision of which is regulated or authorised by MAS, and from taking part, directly or indirectly, in the management of or acting as a director, partner or manager, of any financial institution (FI)As defined in section 2 of the FSMA and performing the function of critical system administrationAs defined in section 6 of the FSMA. For the same duration, they are also prohibited from becoming a substantial shareholder of any FI that is a corporation, or acquiring any interest in any voting share in the FI other than a voting share in which they already have an interest.

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