In Canada, solicitor client privilege is not a statutory rule but an equitable doctrine that emerged from common‑law principles and has been reinforced by court decisions across federal and provincial jurisdictions. It hinges on two core elements: a lawyer‑client relationship and the intent that the communication remain confidential. The privilege is invoked to shield such communications from disclosure in litigation or regulatory investigations.
The doctrine is nuanced: it does not protect every lawyer‑client interaction, nor does it extend to communications that are part of a crime or fraud. Moreover, the privilege can be waived, either intentionally or through procedural missteps, and it may be challenged in court by an opposing party seeking evidence.