Purpose Intensive care physicians play an important role in the identification and referral of potential organ donors in Canada. Nevertheless, little is known about intensivists' attitudes or behaviours in situations where families override previously expressed consent to donate; nor why physicians elect not to refer patients who are potential donors to provincial organ donation organizations (physician non-referral). Methods We integrated questions regarding family override and physician non-referral into an online, self-administered survey of Canadian intensivists. We report results descriptively. Results Fifty percent of targeted respondents (n = 550) participated. Fifty-five percent reported having witnessed family override situations and 44% reported having personally not referred patients who were potential donors. Fifty-six percent of respondents stated they would not pursue donation in the face of family override; 2% stated they would continue with the donation process. Fear of loss of trust in the donation system (81%) and obligation to respect the grief and desires of surrogate decision makers (71%) were frequently reported reasons to respect family override requests. Respondents who chose not to refer patients often did so based on organ dysfunction they assumed would preclude donation (59%), or a perception that the family was too distressed to consider donation This article is accompanied by an editorial. Please see Can J Anesth 2020; 67: this issue.