Belgium’s new Private Investigation Act (PIA) was published in the Official Gazette on 6 December 2024, with most of its provisions having entered into force on 16 December 2024. The PIA replaces the 1991 Belgian Act on Private Detectives with the aim of modernizing the applicable legal framework in light of new investigation methods and the application of the General Data Protection Regulation. With its broader scope of application – this legislation is now also applicable to internal investigations – and the significant additional requirements it imposes, the PIA will undoubtedly impact many businesses operating in Belgium.