The ASEAN Guide on Data Anonymisation (this “Guide”) is a technical and application oriented introductory guide to anonymisation of personal data. The purpose of this Guide is to provide information and guidance on basic data anonymisation that may be referenced by policymakers, regulators as well as industry organisations within countries who are members of the Association of Southeast Asian Nations (“ASEAN”). As member states are increasingly adopting data protection laws, this Guide may be particularly useful as a baseline for adaptation to their specific jurisdictional contexts. To this end, it sets out a general introduction to the anonymisation process and some common anonymisation techniques.