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On June 26, 2569 (2026), the Bank of Thailand (BoT) issued Notification No. 31/2569 establishing mandatory reporting requirements for commercial banks and regulated payment service providers to submit data on suspicious financial movements, unusual customer behaviour, or irregular financial transactions. The notification applies to all commercial banks operating under Thailand's Financial Institution Business Act and non-bank payment service providers licensed or registered under Thailand's Payment System Act, including electronic money service providers, electronic payment service providers, and electronic fund transfer service providers. The BoT issued this notification to strengthen risk management practices across Thailand's financial system and prevent financial institutions and payment service providers from being used to facilitate illegal activities or money laundering. The measure aims to protect financial service users and enhance confidence and stability in Thailand's financial and payment systems. Commercial banks must begin submitting reports based on data from June 2569 onwards, while foreign bank subsidiaries, foreign bank branches, and non-bank payment service providers must begin reporting from September 2569 onwards. Reports must be submitted monthly in CSV file format through the BoT's Data Acquisition and Publication (DAP) system or Application Programming Interface (API) by the 15th of the following month at 16:30. The reporting requirements include suspicious customer behaviour data, enhanced due diligence results, related transaction details, and automated teller machine information when changes occur. Detailed reporting conditions and formats are available on the BoT's website at www.bot.or.th under the data reporting section for financial institutions. The notification takes effect from the day following its publication in the Royal Gazette.