How to say “Refer to former superior” professionally

Level 1: I believe [Former Superior's Name] was the primary lead on that initiative. You might find comprehensive documentation on this in [shared drive/project management tool] or by contacting them directly if appropriate.

Level 2: While that specific project was largely overseen by [Former Superior's Name] during their tenure, I can certainly assist in locating any relevant archived materials or point you towards the current point of contact for historical context.

Level 3: Per the established RACI matrix from that period, [Former Superior's Name] held the 'Accountable' designation for that particular deliverable. I recommend consulting their final project handover documentation, which should delineate all such inquiries.

Level 4: That specific responsibility fell under [Former Superior's Name]'s purview, and my current role's scope does not encompass retrospective analysis of their deliverables. Moving forward, I can prioritize tasks aligned with my current objectives.

Level 5: Check their LinkedIn.

Level 1: That specific deliverable was managed by [Former Superior's Name] during their time with us. I can certainly help you connect with the current account representative who has oversight of those historical engagements, or provide any accessible documentation.

Level 2: While [Former Superior's Name] was the primary contact for that phase of the project, I am now your dedicated point of contact. Let me ascertain the details by reviewing their handover notes and determine the most appropriate next steps for you.

Level 3: As per our service agreement, [Former Superior's Name] was the designated liaison for that specific work package. All final reports and correspondence pertaining to that period are archived under their name and can be retrieved via a formal data request.

Level 4: My current scope of work for your account focuses on [Current Project]. Inquiries regarding work previously completed by [Former Superior's Name] would require an internal review and potentially a scope amendment. Please submit a formal request.

Level 5: They don't work here anymore.

Level 1: That falls outside my direct area of expertise, as [Former Superior's Name] was primarily responsible for that aspect. I'd suggest reaching out to them if you have their contact, or checking the project repository for their final notes.

Level 2: While I can provide some general context, the specifics of that initiative were managed by [Former Superior's Name]. For definitive information, it would be best to consult the original project documentation or the individual who inherited their responsibilities.

Level 3: According to the last team charter, [Former Superior's Name] was the designated subject matter expert for that particular deliverable. All relevant artifacts, including their exhaustive documentation, should be accessible via [specific shared drive path].

Level 4: My current priorities are focused on [Current Project]. Matters pertaining to [Former Superior's Name]'s past responsibilities are not within my operational scope. Please direct such inquiries through the official channels for historical data retrieval.

Level 5: Google them.