Edited: One Word like Eulogy in case of Superannuation(Retirement) [closed]
Solution 1:
How about the word you've used:
tribute, n
something that you say, write, or give that shows your respect and admiration for someone, especially on a formal occasion
Depending on the context within the event, you could also call it a:
toast, n
an expression of good wishes or respect for someone that involves holding up and then drinking from a glass of alcohol, especially wine, after a short speech: