The Thesis by Publication is garnering increasing interest across nations and disciplines. However, more needs to be learned about institutional and supervisory support for this thesis mode to ensure that doctoral candidates pursuing this approach enjoy the best possible outcomes. This paper draws on data from 246 recent successful doctoral candidates who took part in the "2018-2019 PhD candidates' motivations, experiences, and opinions of the thesis by/with publications" study. Findings suggest that perceived institutional support may be more common than supervisory support, and initial institutional support may be eclipsed by ongoing support. Findings suggest that more can be done to support students intending to embark on Thesis by Publication at induction, and that high quality supervisory support can be perceived as integral to candidate success in most cases. However, high dependence on supervisory support paired with comparatively limited institutional support can place workload pressure and increased accountability on supervisors, and may raise ethical implications that require close consideration.