Since laser printers all encode metadata into the printed image, and handwriting is unique to the writer, I was wondering if a typewriter would provide a more anonymous form of paper communication.
I expect it would be possible to determine the model of typewriter, but would it be possible to tell if two samples were made on the very same machine? Are electric typewriters better or worse than manual? (assuming the same operator) What about Selectric or Wheelwriter – would frequently swapping out the typing element help?
The hard part about writing untraceably on typewriters is that they’re relatively rare these days. When everyone used them, it didn’t matter too much if people could tell you used a Remington Quiet-Riter because tons of people had a common model like that. Nowadays, just being able to use a typewriter effectively either (a) means you’re old enough to have used one or (b) typewriters/vintage stuff is an interest of yours – or now, maybe just someone interested in anonymity enough to learn. If someone could tell what model of machine you typed it on, that would narrow it down further, and (depending on what the inquiry is about) that may be good enough info for their purposes, given the rarity of using typewriters today.
Since these machines are electromechanical, rather than digital, it would be quite difficult to encode identifying information into the type. Other considerations: tracing the purchase of the typewriter, ribbons, and possibly repair/cleaning services to get it working.