Except for that creepy letter that conjures up memories of Rathergate.
Plus, if I should need to document my PhD, I request copies of my transcript be sent; I don't ask for a letter stating the degree I received.I suspect the letter shown is a fake. The letter shows oddities: the font size changes for no discernable reason, and even though it is not right justified, there are variable gaps between words.
Just out of curiosity, I looked at that letter again. Right above the signature line, it says "IL CAPO UFFICIO SEGRETERIE FACOLTA UMANISTICHE", which translates into English as "HEAD OF THE HUMANITIES FACULTY OFFICES". That leads to another oddity to ponder. Why would the Humanities department verify a degree awarded by the Physics department? (Answer: because the degree being verified is, in fact a Master's degree in Philosophy, not a Doctorate in any science.)