More than 99.999% of all printed pages don't have the name of the person who printed them on them. I can't even come up with examples where the large majority of the material someone printed wasn't belonging to someone else, ie, printing a book, learning material, computer generated pictures, photographs, things like this.

"Printing a letter" is something I doubt anyone is doing in any meaningful percentage that this makes sense. A person printing a single small book they didn't want to buy is printing more pages just that one time than they will ever print with their name on them in their whole life.