A professor (currently Associate Professor) I used to collaborate with is being considered for the promotion to "full Professor". The Department asked me to write a letter supporting the professor's promotion as former student.
I am super happy to be able to support this promotion because I have a great opinion of this scholar and I genuinely think it is fully deserved, but I have few concerns:
- I am just a postdoc, and usually referral letters are asked to other professors (ok, it's true I was asked as former student).
- I have not been formally student of this person, neither I was enrolled in that university. I was doing my PhD in another university in the same city and just met the professor casually due to common friends and interests. The professor became my PhD co-advisor, but this was mainly to acknowledge the nice discussions and ideas exchanges we had over lunch about my work, more than a formal collaboration.
- we did not publish papers together.
That told, I am wondering whether I should be really writing this letter, and, in the positive case, what kind of shape I should give to my message.