This Practice Note is intended for in-house lawyers, including lawyers working in-house in law firms, eg in the compliance or general counsel function. It explains what legal professional privilege (LPP) is, how LPP operates and who it belongs to. This Practice Note also explains how LPP can be lost or waived and summarises LPP issues in other jurisdictions. It covers legal advice privilege and litigation privilege, which are two distinct types of LPP.