Great topic, @Andrea_Mayer!
I’m guilty of filenames like:
project overview finalproject overview final v2project overview final v3- etc.
This reminds me of being at the airport gate for a departing flight and hearing, “This is the final boarding call for flight 9999.”
Then starting a few minutes later and repeating several more times, “Once again, this is the final boarding call . . .”
Please react to this post if you believe there can never be more than one final file attachment per document or final boarding call per flight. 
Larry